US 12,066,801 B2
Spoiling apparatus for triggering turbulent transition by autonomous disturbance and spoilers
Hongzhi Lu, Beijing (CN); Jing Zhao, Beijing (CN); Lili Liu, Beijing (CN); Junpeng Hui, Beijing (CN); Minhua Liu, Beijing (CN); Min Zhao, Beijing (CN); Leijing Kang, Beijing (CN); Yue Zhao, Beijing (CN); and Yifan Li, Beijing (CN)
Assigned to CHINA ACADEMY OF LAUNCH VEHICLE TECHNOLOGY, Beijing (CN)
Appl. No. 17/261,535
Filed by CHINA ACADEMY OF LAUNCH VEHICLE TECHNOLOGY, Beijing (CN)
PCT Filed Nov. 2, 2018, PCT No. PCT/CN2018/113737
§ 371(c)(1), (2) Date Jan. 19, 2021,
PCT Pub. No. WO2020/042351, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 201811007947.X (CN), filed on Aug. 31, 2018.
Prior Publication US 2021/0294285 A1, Sep. 23, 2021
Int. Cl. G05B 17/02 (2006.01); B63B 1/32 (2006.01); B64C 5/10 (2006.01)
CPC G05B 17/02 (2013.01) [B63B 1/322 (2013.01); B64C 5/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A spoiler apparatus for triggering turbulence transition by autonomous disturbance, the apparatus comprising a groove, a spoiler, and an elastic member, wherein:
the groove is provided upstream of a bottom surface of a vehicle,
the spoiler is provided in the groove, and one end of the spoiler is fixed in the groove via a swing shaft, and another end of the spoiler is connected to a bottom of the groove via the elastic member and is rotatable about the swing shaft, and
an outward pushing force on the spoiler generated by the elastic member in a maximally compressed state is balanced with a pressure in a critical state of flow;
wherein the spoiler is configured as a flow-guiding plane structure having a continuously increasing curvature, an upstream portion of the spoiler is parallel to a flow incoming direction, and a downstream portion of the spoiler is parallel to a circumferential direction; and
wherein a plurality of dovetail grooves is arranged in parallel to each other on a surface of the spoiler.