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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1986, Vol. 7 ›› Issue (4): 325-331.
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He Chengjan, Gao Zheng
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Abstract: In this paper an investigation of the ground vortex, the significant aerodynamic phenomenon in rotor aerodynamics on nap-of-the earth, is carried out. Based on the analysis of the rotor wake near the ground, a theoretical method, including the analytical model, the formulae and the computer program, has been established which can be used for calculationof the ground vortex--the longitudind position, the height above theground and its strength. By using a free wake model, with the ground vortex taken into account, the distribution of induced inflow at the r otor disc is also calculated. All computational results are compared with available experimental data and found in good agreement.
He Chengjan;Gao Zheng. A STUDY OF THE ROTOR WAKE IN NAP-OF-THE-EARTH[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1986, 7(4): 325-331.
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