Trimming Analysis Method of Quad Tilt Rotor Based on Aerodynamic Interference Model

2020 ◽  
pp. 1-13
Author(s):  
Zhigang Wang ◽  
Qiannan Wang ◽  
Hongrui Yu ◽  
Dengyan Duan ◽  
Zhiwei Ding ◽  
...  
Keyword(s):  
Interference Model ◽  
Analysis Method ◽  
Tilt Rotor ◽  
Aerodynamic Interference

Aerodynamic interference test of quad tilt rotor aircraft in wind tunnel

2019 ◽  
Vol 233 (15) ◽  
pp. 5553-5566 ◽  
Author(s):  
Kun Chen ◽  
Zhiwei Shi ◽  
Shengxiang Tong ◽  
Yizhang Dong ◽  
Jie Chen
Keyword(s):  
Wind Tunnel ◽  
Reference Value ◽  
Ground Effect ◽  
Open Loop ◽  
Force Balance ◽  
Scale Model ◽  
Operating Condition ◽  
Tilt Rotor ◽  
Interference Test ◽  
Aerodynamic Interference

There is an obvious aerodynamic interference problem that occurs for a quad tilt rotor in near-ground hovering or in the conversion operating condition. This paper presents an aerodynamic interference test of the quad tilt rotor in a wind tunnel. A 1:35 scale model of the quad tilt rotor is used in this test. To substitute for the ground, a moveable platform is designed in a low-speed open-loop wind tunnel to simulate different flight altitudes of the quad tilt rotor in hovering or forward flight. A rod six-component force balance is used to measure the loads on the aircraft, and the flow field below the airframe is captured using particle image velocimetry. The experimental results show that the ground effect is significant when the hover height above the ground is less than the rotor diameter of the quad tilt rotor aircraft, and the maximum upload of the airframe is approximately 12% of the total vertical thrust with the appearance of obvious fountain flow. During the conversion operating condition, the upload of the airframe is reduced compared with that in the hovering state, which is affected by rotor wake and incoming flow. The aerodynamic interference test results of the quad tilt rotor aircraft have important reference value in power system selection, control system design, and carrying capacity improvement with the advantage of ground effect.

scholarly journals Aerodynamic Interference Model for Multirotors in Forward Flight

2020 ◽  
Vol 57 (6) ◽  
pp. 1220-1223
Author(s):  
Dong Han ◽  
George N. Barakos
Keyword(s):  
Interference Model ◽  
Forward Flight ◽  
Aerodynamic Interference

Passenger Vehicle Clutch Reliability Optimization Based on the Stress-Strength Interference Model

2014 ◽  
Vol 509 ◽  
pp. 86-91 ◽  
Author(s):  
Zheng Feng Yan ◽  
Gai Hua Li
Keyword(s):  
Failure Rate ◽  
Transmission System ◽  
Interference Model ◽  
Installation Space ◽  
Mechanical Transmission ◽  
Analysis Method ◽  
Passenger Vehicle ◽  
Passenger Car ◽  
Automotive Engine ◽  
Probability And Statistics

With the progress of automotive engine technology, more strict requirements such as comfort, durability and more compact installation space are proposed to automotive transmission system. The failure rate of passenger car clutch is still high and its reliability has troubled users and manufacturers. The paper adopted system engineering analysis method for reliability analysis and optimization of passenger car clutch based on the stress - strength interference model. Compared with actual cases, probability and statistics theory is used to compare the failure rate and reliability, and the method is verified feasible. The method also can be applied to other dry friction type mechanical transmission system.

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