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所属单位：航空学院
发表刊物：Hangkong Dongli Xuebao
摘要：A numerical method based on high-efficient trim strategy and moving overset grid technique was developed to predict the aerodynamic characteristics of rigid coaxial rotor. To simulate the rotor's flow-field, the Reynolds-averaged Navier-Stokes equations were discretized by Roe-monotone upstream-centered schemes for conservation laws(MUSCL) scheme with Spalart-Allmaras turbulence model. A delta trim method was implemented. Researches on the aerodynamic interaction and trim characteristics of a coaxial rigid rotor model were conducted. Results indicated that the delta method consumed much less time than the conventional trim method with the same accuracy. The aerodynamic interaction of rigid coaxial rotor, with a smaller rotors' distance, was much stronger than that of normal coaxial rotor. In hover condition, the lower rotor required greater collective pitch while providing less tensile force due to the upper rotor's downwash; in low speed forward flight, the aerodynamic interaction brought about a more asymmetrical airflow on the rotors' disks, leading to greater difference of cyclic pitches. In addition, the rotor's power efficiency can be improved by a proper lift offset. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.
ISSN号：1000-8055
是否译文：否
发表时间：2017-12-01
合写作者：Qi, Haotian,徐国华,Huang, Shuilin
通讯作者：Qi, Haotian,史勇杰