Results 31 to 40 of about 167,915 (386)
Xibei Gongye Daxue Xuebao, 2019 With the continuous development and widespread attention of electric propulsion technology in traditional transportation fields such as automobiles and trains, the distributed propeller propulsion technology applied to electric or hybrid electric medium ...
doaj +1 more source
Deformation Measurements of Helicopter Rotor Blades Using a Photogrammetric System
Photonics, 2022 As an important part of the helicopter, the rotor directly affects flight safety and flight quality. Knowledge of the rotor dynamic behaviors is significant for validating and optimizing the performance of the helicopter rotor system.
Chenglin Zuo +4 more
doaj +1 more source
Hangkong gongcheng jinzhan, 2019 With the increase in demand for long range rapid delivery of heavy equipment and materials such as missile launch vehicles, heavy tanks, and intelligent unmanned clusters, and the gradual maturity of penetrating counterair capabilities such as stealth ...
Yang Xiaochuan +5 more
doaj +1 more source
Procedia Engineering, 2011 AbstractBaseball is one of the popular games in America, North Asia and some parts of Europe and Africa. Despite being a popular game, scan data is not available on aerodynamic properties of baseball. Having over 108 curved stitches, complex seams and their orientation, the airflow around the ball is significantly complex and little understood.
Firoz Alam +3 more
openaire +2 more sources
Research on Stall Characteristics of Droop Leading Edge Combined with Internal-blowing Flaps
Hangkong gongcheng jinzhan, 2022 The internally blown flap is of efficient lift enhancement ability,but stall angle of attack drops significantly at a higher jet momentum.In order to improve the stall characteristics,the stall characteristics of the internally blown flap with the droop ...
HE Meng, ZHANG Liu, ZHAO Lei, LI Chang
doaj +1 more source
Entropy, 2022 Strong viscous interaction and multiple flow regimes exist when vehicles fly at high altitude and high Mach number conditions. The Navier–Stokes(NS) solver is no longer applicable in the above situation.
Dingwu Jiang +3 more
doaj +1 more source
Advances in Aerodynamics, 2019 The accuracy of gradient reconstruction methods on unstructured meshes is analyzed both mathematically and numerically. Mathematical derivations reveal that, for gradient reconstruction based on the Green-Gauss theorem (the GG methods), if the summation ...
Nianhua Wang +3 more
doaj +1 more source
Aerospace, 2023 A body flap/RCS-integrated configuration is often used to achieve pitch trimming and controlled flight in near space for hypersonic vehicles. Under the high temperature and pressure load induced by the expansion wave at the nozzle exit, the body flap is ...
Ruhao Hua, Qi Chen, Zhao Wan, Hao Chen
doaj +1 more source
Study on Flow Mechanism of a Morphing Supercritical Airfoil
Shock and Vibration, 2021 In order to maintain the best performance in flight, a new concept, morphing aircraft, has been proposed, which can change the real-time aerodynamic characteristics under different flight conditions.
Yuanjing Wang +4 more
doaj +1 more source