IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0441944
(2012-04-09)
|
등록번호 |
US-8702042
(2014-04-22)
|
우선권정보 |
DE-10 2009 049 049 (2009-10-12) |
발명자
/ 주소 |
- Gerber, Martin
- Schrauf, Geza
|
출원인 / 주소 |
|
대리인 / 주소 |
Jenkins, Wilson, Taylor & Hunt, P.A.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
2 |
초록
▼
A flow body is disclosed, particularly for aircraft. The flow body includes an outer side impinged on in a predetermined manner by a fluid in a direction of impinging flow, the flow body having on its outer side at least one flow control device including micro-perforations arranged in at least one s
A flow body is disclosed, particularly for aircraft. The flow body includes an outer side impinged on in a predetermined manner by a fluid in a direction of impinging flow, the flow body having on its outer side at least one flow control device including micro-perforations arranged in at least one segment of the outer side, at least one connecting passage communicated with the micro-perforations via at least one suction chamber so fluid flowing through the micro-perforations flows via the suction chamber into the connecting passage, at least one suction device having a first inlet communicated with the connecting passage, a second inlet communicated with at least one ram fluid feed line, wherein the ram fluid feed line is in a region of the flow body opposite to the direction of impinging flow of the flow body, and an outlet device for discharging the fluid.
대표청구항
▼
1. A flow body, comprising an outer shell having a ram air region and an enveloping flow region which result from a presence of a predetermined flow of a fluid enveloping the flow body in a direction of impinging flow, wherein the enveloping flow region is located to a rear of the ram air region at
1. A flow body, comprising an outer shell having a ram air region and an enveloping flow region which result from a presence of a predetermined flow of a fluid enveloping the flow body in a direction of impinging flow, wherein the enveloping flow region is located to a rear of the ram air region at least during cruise conditions and when viewed in the direction of flow, and at least one flow control device comprising: a plurality of micro-perforations penetrating the outer shell, which are arranged in at least one segment of the outer shell that is situated in the enveloping flow region;a plurality of suction chambers each adjoining an inside of the flow body at the outer shell thereof, wherein upper walls of the plurality of suction chambers are each part of or adjoin an outer skin such that the micro-perforations extend inside the suction chambers, and lower walls of the plurality of suction chambers each present at least one orifice opening or a valve passage, with sidewalls of the plurality of suction chambers delimiting inner spaces thereof from each other,at least one connecting passage which is situated below the suction chambers when viewed in a thickness direction of the flow body,at least one suction device connected to the connecting passage and including a first inlet opening for drawing in fluid having entered through the micro-perforations, which is communicated with the connecting passage,whereinthe flow control device additionally comprises a ram fluid feed line which includes a ram fluid inlet opening situated in the ram air region, andthe suction device comprises a suction device housing forming an evacuation chamber and including the first inlet opening and an outlet opening, and a nozzle including an inlet opening to which the ram fluid feed line is connected,wherein the outlet opening is situated in a prolongation of a longitudinal direction of the nozzle, andwherein the suction device is positioned in the flow body such that the outlet opening, when viewed in a chord direction of the flow body, is situated in a range between 40% and 60% of an entire flow body chord. 2. The flow body according to claim 1, wherein an entire length of the suction device housing extending in the chord direction of the flow body is between 700 mm and 900 mm. 3. The flow body according to claim 1, wherein the micro-perforations have a diameter of between 10 μm and 1,000 μm. 4. The flow body according to claim 1, wherein a distance between two respective adjacent micro-perforations is between 0.1 mm and 2.5 mm. 5. The flow body according to claim 1, wherein the flow control device is realized such that at the outlet opening of the suction device housing a fluid mass flow is present at which a fluid pressure at the outlet opening is lowered to an ambient pressure of the flow body in a respective operational condition or to a negative pressure prevailing at an outer side thereof at a same chord position of the flow body, with a respective deviation of 20% at the most. 6. The flow body according to claim 1, wherein the ram fluid feed line merges into the flow body at an opening, with the opening being arranged on an outside of the flow body such that a stagnation point of the flow body is situated within the opening when viewed in the direction of flow. 7. The flow body according to claim 1, wherein the flow body has in its rear area, when viewed in the direction of flow, an outlet device through which air present in an interior of the flow body may escape to surroundings of the flow body, and wherein the outlet device is connected to a mixing chamber and has a form of a diffusor configured to open on the interior of the flow body. 8. The flow body according to claim 1, wherein the flow body is an engine nacelle having a substantially cylindrical external configuration, with a longitudinal axis of the engine nacelle running substantially in parallel with the direction of impinging flow of the fluid, and/or the connecting passage extending around the longitudinal axis in a circumferential direction. 9. The flow body according to claim 8, wherein the segment in an outer side having the flow control device arranged therein extends at least partly in the circumferential direction and extends in a longitudinal direction of the engine nacelle over a range of 0% to 50% of a surface starting from a stagnation point of the engine nacelle. 10. The flow body according to claim 1, wherein the flow body is part of an airframe having an airframe chord direction, an airframe spanwise direction, and an airframe thickness direction, with the connecting passage extending along the airframe spanwise direction. 11. The flow body according to claim 10, wherein the segment in an outer side having the flow control device arranged therein extends at least partly in the airframe spanwise direction and extends in the airframe chord direction over a range of 0% to 75% of a surface starting from a stagnation point of the airframe. 12. The flow body according to claim 1, wherein the flow body is part of an airframe,the suction device housing comprises two inlet openings arranged so as to face each other, andthe flow body comprises the outer shell having a first and a second enveloping flow region and the ram air region is situated between these, with outer sides of the first and second enveloping flow regions being situated opposite to each other.
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