• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a structure (100) providing acoustic attenuation of a flow of a first fluid and a heat exchange between the first fluid and a second fluid, the structure (100) comprising: a first wall (102) which is perforated, - a second wall (104), - a plurality of intermediate walls (106) extending between the first wall (102) and the second wall (104), and - for each intermediate wall (106), a channel (108) for receiving the second fluid and inscribed inside the intermediate wall (106). Such a structure makes it possible to integrate the acoustic wave attenuation function and the heat exchange function optimally.
    公开号:FR3051019A1
    申请号:FR1653992
    申请日:2016-05-03
    公开日:2017-11-10
    发明作者:Maxime Zebian
    申请人:Airbus Operations SAS；
    IPC主号:
    专利说明:

    Structure providing attenuation of acoustic waves and heat exchange
    TECHNICAL AREA
    The present invention relates to a structure providing attenuation of acoustic waves generated by the flow of a first fluid and also allowing a heat exchange between the first fluid and a second fluid, and an aircraft having such a structure.
    STATE OF THE PRIOR ART
    A turbomachine of an aircraft, in particular a turbomachine with a double flow, has a stream of air which opens at the front and through which fresh air enters the turbomachine. The vein of air is delimited by internal walls that channel the air. Part of the air is used to carry out a heat exchange with fluids of the aircraft. To this end, heat exchangers are set up at the internal walls. The interior of the vein is also lined with structures ensuring attenuation of the acoustic waves generated by the flow of air in the vein and thus reducing the noise of the turbomachine. Such structures generally comprise a perforated wall which is oriented towards the interior of the vein and at the rear of which is disposed a set of cavities, in particular honeycombs. The cavities form quarter-wave resonators that attenuate a particular frequency.
    An implementation of heat exchangers at the internal walls of the vein decreases the space allocated to the acoustic structures which can cause an increase in the noise of the turbomachine.
    SUMMARY OF THE INVENTION
    An object of the present invention is to provide a structure providing attenuation of the acoustic waves generated by the flow of a first fluid and a heat exchange between the first fluid and a second fluid. For this purpose, there is provided a structure providing an acoustic attenuation of a flow of a first fluid and a heat exchange between the first fluid and a second fluid, the structure comprising: - a first wall which is perforated, - a second wall a plurality of intermediate walls extending between the first wall and the second wall, and for each intermediate wall, a pipe intended to receive the second fluid and inscribed inside the intermediate wall.
    Such a structure makes it possible to integrate the acoustic wave attenuation function and the heat exchange function optimally.
    According to a particular embodiment, each pipe has an elliptical profile.
    Advantageously, the pipe is at a distance from both the first wall and the second wall.
    According to a particular embodiment, the intermediate wall takes the form of a double wall consisting of two parallel walls between the first wall and the second wall and separated by a free space constituting the pipe.
    Advantageously, the intermediate wall has a dividing wall which extends between the two walls of the intermediate wall and which delimits, at the level of the first wall, a chamber separated from the pipe by the dividing wall.
    Advantageously, the structure comprises a separation wall secured to the intermediate wall and extending inside the pipe to separate the pipe into two sub-pipes.
    Advantageously, the partition wall is a corrugated plate.
    Advantageously, the partition wall has through holes connecting on either side of the partition wall.
    According to a variant, each wall constituting the intermediate wall has a portion which extends beyond the first wall.
    According to another variant, each partition wall has a portion which extends beyond the first wall.
    According to another variant, the structure comprises fins which extend along the first wall of the side opposite the pipes, each fin extends perpendicular to the partition walls and each fin is secured to the partition walls along which it is in touch.
    According to another variant, the structure comprises fins which extend along the first wall of the side opposite the pipes, each fin extends perpendicularly to the intermediate walls and is integral with the first wall. The invention also proposes an aircraft comprising a nacelle with an inner wall delimiting an air stream and wherein the inner wall consists of structures according to one of the preceding variants, wherein the first wall is oriented towards the interior of the vein .
    BRIEF DESCRIPTION OF THE DRAWINGS
    The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in connection with the attached drawings, among which: FIG. . 1 shows a side view of an aircraft according to the invention, FIG. 2 shows a perspective view of a structure according to a first embodiment of the invention, FIG. 3 shows a perspective view of a structure according to a second embodiment of the invention, FIG. 4 shows a perspective view of a structure according to a third embodiment of the invention, FIG. 5 shows a perspective view of a structure according to a fourth embodiment of the invention, FIG. 6 shows a perspective view of a structure according to a fifth embodiment of the invention, and FIG. 7 shows a perspective view of a structure according to a sixth embodiment of the invention.
    DETAILED DESCRIPTION OF EMBODIMENTS
    Fig. 1 shows an aircraft 10 which has a nacelle 20 inside which is arranged a turbomachine. The inner wall of the nacelle 20 delimits a stream of air that passes through the turbomachine. Each FIG. 2 to 6 shows a structure which provides, on the one hand, an acoustic attenuation of a first fluid flowing along this structure and, on the other hand, a heat exchange between the first fluid and a second fluid circulating at inside this structure.
    In the remainder of the description, each structure is described as constituting a part of an inner wall of a nacelle 20 of an aircraft 10, but it may be used in another environment as long as it is necessary to mitigate the noise generated by the flow of a first fluid and to achieve a heat exchange between the first fluid and a second fluid.
    Fig. 2 shows a structure 100 according to a first embodiment which comprises: - a first wall 102 which is perforated, - a second wall 104 at a distance and, here, parallel to the first wall 102, - a plurality of intermediate walls 106 ' extending between the first wall 102 and the second wall 104, here perpendicular to the first wall 102 and the second wall 104, and for each intermediate wall 106, a pipe 108 inscribed inside the intermediate wall 106.
    All the intermediate walls 106 are parallel to each other and thus create corridors 112 and the holes 110 made in the first wall 102 ensure the passage between the outside of the first wall 102 and the corridors 112.
    In the case of FIG. 2, the pipes 108 are arranged at a distance from both the first wall 102 and the second wall 104.
    The intermediate walls 106 are made of a material having a high thermal conduction, such as a metal material.
    In the case of a flow of the first fluid into a vein, the first wall 102 is oriented towards the interior of the vein. The first fluid which is here the air of the vein flows along the first wall 102 and the holes 110 ensure the penetration of a portion of the air in the corridors 112 and thus the attenuation of acoustic waves generated by the flow of air.
    A second fluid which may be for example oil circulates in the pipes 108 and the oil is cooled by heat exchange through the walls of the pipes 108 and the intermediate walls 106 with the first fluid.
    The fact of deporting each pipe 108 away from the first wall 102 limits the risk of damage to the pipes in case of shocks on the first wall 102.
    In the embodiment of the invention presented here, the structure 100 consists of a plurality of substantially rectangular section profiles where the profiles are fixed to each other and where each channel 108 is encapsulated between the two neighboring walls of two neighboring profiles. The assembly of the structure can be achieved by all appropriate techniques depending on the materials used, such as brazing, welding, gluing from preformed or extruded parts.
    The structure 100 makes it possible to ensure cross-flow or parallel flow operation between the first fluid and the second fluid, whether in co-current or in countercurrent.
    Fig. 3 shows a structure 200 according to a second embodiment which has the same elements as the structure 100 according to the first embodiment except that the structure 200 comprises a partition wall 214 which separates each pipe 208 into two sub-pipes 208a -b. The partition wall 214 is also made of a material having a high thermal conductivity. The partition wall 214 is integral with the intermediate wall 106 and extends inside the pipe 208. Such a partition wall 214 improves the heat exchange between the first fluid and the second fluid.
    The structure 200 makes it possible to ensure cross-flow or parallel flow operation between the first fluid and the second fluid, whether in co-current or in countercurrent.
    Fig. 4 shows a structure 300 according to a third embodiment which has the same elements as the structure 200 according to the second embodiment except that each partition wall 314 has a portion 316 which extends beyond the first wall 102 , that is to say inside the vein to ensure a better heat exchange between the first fluid and the second fluid. Each portion 316 is thus parallel to the partition wall 314 that it extends and to the pipes 208 of the structure 300. The structure 300 ensures a parallel flow operation between the first fluid and the second fluid whether in co -current or countercurrent.
    Fig. 5 shows a structure 400 according to a fourth embodiment which has the same elements as the structure 200 according to the second embodiment except that it comprises fins 416 which extend along the first wall 102 of the opposite side 208. Each fin 416 is also made of a material having a high thermal conductivity. Each fin 416 extends perpendicular to the partition walls 414 and the first wall 102, and is integral with the partition walls 414 along which it is in contact. The structure 400 ensures cross-flow operation between the first fluid and the second fluid.
    Fig. 6 shows a structure 500 according to a fourth embodiment which comprises the same elements as the structure 100 according to the first embodiment except that it comprises fins 516 which extend along the first wall 102 of the opposite side 108. Each fin 516 is also made of a material having a high thermal conductivity. Each fin 516 extends perpendicular to the intermediate walls 106 and the first wall 102, and is integral with the first wall 102. The structure 500 ensures cross-flow operation between the first fluid and the second fluid
    According to a preferred embodiment, each duct 108, 208 has an elliptical and non-circular profile, in particular with a ratio between the length of the major axis and the length of the minor axis of the order of 4 to 1. When a wall separation 214, 314, 414 is present, the pipe 208 takes the form of two half-ellipses 208a and 208b. The elliptical shape makes it possible to increase the surface area useful for heat exchange while limiting the acoustically untreated surface.
    In the embodiment of the invention shown in Figs. 2 to 6, the major axis is perpendicular to the first and second walls 102 and 104.
    The intermediate walls 106 are deformed by the presence of the pipes 108 and 208 and these deformations create narrowing of the corridors 112 at the pipes 108 and 208.
    The installation of pipes 108, 208 of elliptical section makes it possible to obtain larger fluid passage sections with respect to circular sections having the same impact on the acoustic treatment surface, which makes it possible to limit the pressure losses. hydraulic.
    The elliptical sections also make it possible to boost the heat exchange coefficient, in particular when the width of the corridor becomes small in front of its height.
    The elliptical sections also make it possible to have a large heat exchange surface between the fluid and the intermediate walls 106, and this exchange surface is further increased when a separation plate is incorporated which is put in place in the pipe. .
    To increase the contact area of the fluid in line 208 split into two sub-pipes 208a-b, the partition wall 214, 314, 414 may be a corrugated plate.
    Whether the partition wall 214, 314, 414 is corrugated or planar, it may have through holes connecting on either side of the partition wall 214, 314, 414 to ensure a better homogenization of the temperature of the second fluid and participate in the creation of local turbulence increasing the heat exchange coefficient on the side of the second fluid and therefore the exchange in general.
    In the examples illustrated in Figs. 2 to 6, the pipes 108, 208 are centered at mid-height of the intermediate walls 106 but a connection towards the first wall 102 makes it possible to minimize the thermal resistance related to the length between the first wall 102 and the walls of the pipes 108, 208 .
    Fig. 7 shows a structure 600 according to a fifth embodiment which comprises: - a first wall 102 which is perforated, - a second wall 104, - a plurality of intermediate walls 606 extending between the first wall 102 and the second wall 104, and for each intermediate wall 606, a pipe 608 intended to receive a fluid and inscribed inside the intermediate wall 606.
    All the intermediate walls 606 are parallel to each other and thus create corridors 112 and the holes 110 made in the first wall 102 ensure the passage between the outside of the first wall 102 and the corridors 112.
    In the case of FIG. 7, the intermediate wall 606 takes the form of a double wall consisting of two parallel walls extending between the first wall 102 and the second wall 104 and separated by a free space constituting the channel 608. That is to say that the pipe 608 is disposed between the two walls constituting the intermediate wall 606.
    The intermediate wall 606 has a dividing wall 612 which extends between the two walls of the intermediate wall 606 and which delimits, at the level of the first wall 102, a chamber 610 separated from the pipe 608 by the dividing wall 612. The pipe 608 is thus separated from the first wall 102 by the chamber 610 which is filled with air or empty. Thus, in the event of very strong mechanical stresses or in the event of an impact, the chamber 610 constitutes a barrier which prevents the first fluid from mixing with the second fluid, by absorbing part of the deformation energy.
    As for the previous embodiments, the structure 600 may have a partition wall 614, possibly corrugated and pierced, integral with the intermediate wall 606 and extending inside the pipe 608 to separate the pipe 608 in two sub-portions. pipes. The partition wall 614 may be corrugated and / or pierced.
    The structure 600 may also have fins conforming to those of the embodiment of FIG. 6.
    The structure 600 may also have fins 616 which originate from an extension of the walls constituting the intermediate wall 606 beyond the first wall 102. In other words, each wall constituting the intermediate wall 606 has a portion 616 which extends beyond the first wall 102.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1) Structure (100, 200, 300, 400, 500, 600) providing acoustic attenuation of a flow of a first fluid and a heat exchange between the first fluid and a second fluid, the structure (100) comprising: - a first wall (102) which is perforated, - a second wall (104), - a plurality of intermediate walls (106, 606) extending between the first wall (102) and the second wall (104), and - for each intermediate wall (106, 606), a pipe (108, 208, 608) for receiving the second fluid and inscribed inside the intermediate wall (106, 606).
    [0002]
    2) Structure (100, 200, 300, 400, 500) according to claim 1, characterized in that each pipe (108,208) has an elliptical profile.
    [0003]
    3) Structure (100, 200, 300, 400, 500) according to claim 2, characterized in that the pipe (108,208) is at a distance from both the first wall (102) and the second wall (104).
    [0004]
    4) Structure (600) according to claim 1, characterized in that the intermediate wall (606) takes the form of a double wall consisting of two parallel walls between the first wall (102) and the second wall (104) and separate by a free space constituting the channel (608).
    [0005]
    5) Structure (600) according to claim 4, characterized in that the intermediate wall (606) has a dividing wall (612) which extends between the two walls of the intermediate wall (606) and which delimits, at the level of of the first wall (102), a chamber (610) separated from the pipe (608) by the dividing wall (612).
    [0006]
    6) Structure (200,300,400, 600) according to one of claims 1 to 5, characterized in that it comprises a partition wall (214, 314, 414, 614) secured to the intermediate wall (106, 606) and the extending inside the pipe (208, 608) to separate the pipe (208, 608) into two sub-pipes (208a-b).
    [0007]
    7) Structure (200, 300, 400, 600) according to claim 6, characterized in that the partition wall (214, 314, 414,614) is a corrugated plate.
    [0008]
    8) Structure (200, 300, 400, 600) according to ime of claims 6 or 7, characterized in that the partition wall (214, 314, 414, 614) has through holes.
    [0009]
    9) Structure (600) according to one of claims 4 or 5, characterized in that each wall constituting the intermediate wall (606) has a portion (616) which extends beyond the first wall (102).
    [0010]
    10) Structure (300) according to claim 1, characterized in that it comprises a partition wall (314) integral with the intermediate wall (106) and the .... ______ extending inside the pipe (208) ) to separate the pipe (208) into two sub-pipes (208a-b), and in that each partition (314) has a portion (316) extending beyond the first wall (102).
    [0011]
    11) Structure (400) according to claims 1 and 6, characterized in that it comprises fins (416) which extend along the first wall (102) of the side opposite the pipes (208), in that each fin (416) extends perpendicularly to the partition walls (414) and in that each fin (416) is integral with the partition walls (414) along which it is in contact.
    [0012]
    12) Structure (500, 600) according to one of claims 1 to 8, characterized in that it comprises fins (516) which extend along the first wall (102) of the side opposite the pipes (108). , 608), in that each fin (516) extends perpendicular to the intermediate walls (106, 606) and is integral with the first wall (102).
    [0013]
    13) Aircraft (10) comprising a nacelle (20) with an inner wall delimiting an air stream and wherein the inner wall consists of structures (100, 200, 300, 400, 500, 600) according to one of the claims previous, where the first wall (102) is oriented towards the interior of the vein.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3051019B1|2020-01-10|
    US10480412B2|2019-11-19|
    US20170321603A1|2017-11-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2917067A1|2007-06-08|2008-12-12|Airbus France Sas|COATING FOR ACOUSTIC TREATMENT INCORPORATING THE FUNCTION OF TREATING FROST WITH HOT AIR|
    GB2476855A|2009-11-27|2011-07-13|Rolls Royce Plc|Acoustic liner and heat exchanger for gas turbine inlet duct|
    FR2983835A1|2011-12-13|2013-06-14|Airbus Operations Sas|METHOD FOR PRODUCING A PANEL FOR ACOUSTIC TREATMENT|
    US20140027102A1|2012-07-27|2014-01-30|General Electric Company|Air-cooled engine surface cooler|FR3084406A1|2018-07-30|2020-01-31|Safran Aircraft Engines|HEAT EXCHANGE AND NOISE REDUCTION PANEL|FR2912781B1|2007-02-20|2009-04-10|Airbus France Sas|COATING FOR ACOUSTIC TREATMENT INCORPORATING THE FUNCTION OF TREATING FROST WITH HOT AIR|
    US10178805B2|2014-05-23|2019-01-08|Tesla, Inc.|Heatsink with internal cavity for liquid cooling|US10533580B2|2017-02-13|2020-01-14|General Electric Company|Apparatus including heat exchanger and sound attenuator for gas turbine engine|
    US11060480B2|2017-11-14|2021-07-13|The Boeing Company|Sound-attenuating heat exchangers and methods of utilizing the same|
    US11143170B2|2019-06-28|2021-10-12|The Boeing Company|Shape memory alloy lifting tubes and shape memory alloy actuators including the same|
    US11168584B2|2019-06-28|2021-11-09|The Boeing Company|Thermal management system using shape memory alloy actuator|
    法律状态:
    2017-05-23| PLFP| Fee payment|Year of fee payment: 2 |
    2017-11-10| PLSC| Publication of the preliminary search report|Effective date: 20171110 |
    2018-05-22| PLFP| Fee payment|Year of fee payment: 3 |
    2019-05-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-05-22| PLFP| Fee payment|Year of fee payment: 5 |
    2021-05-20| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1653992A|FR3051019B1|2016-05-03|2016-05-03|STRUCTURE PROVIDING ACOUSTIC WAVE ATTENUATION AND HEAT EXCHANGE|
    FR1653992|2016-05-03|FR1653992A| FR3051019B1|2016-05-03|2016-05-03|STRUCTURE PROVIDING ACOUSTIC WAVE ATTENUATION AND HEAT EXCHANGE|
    US15/583,902| US10480412B2|2016-05-03|2017-05-01|Structure ensuring attenuation of acoustic waves and thermal exchange|
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