Unsteady aerodynamic noise prediction of contra-rotating open rotor using meshless method

作     者：Zhiliang HONG Meng SU Haitao ZHANG Zerui XU Lin DU Lingfeng CHEN Zhiliang HONG;Meng SU;Haitao ZHANG;Zerui XU;Lin DU;Lingfeng CHEN

作者机构：College of Safety Science and EngineeringCivil Aviation University of ChinaTianjin 300300China Civil Aviation Administration of ChinaBeijing 100710China Research Institute of Aero-EngineBeihang UniversityBeijing 100191China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第8期

页      面：144-165页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the financial support from the National Natural Science Foundation of China(Nos.52276045 and 52206062) the Fundamental Research Funds for the Central Universities,China(Nos.3122019171,3122021087 and 3122022QD06) 

主　　题：Contra-Rotating Open Rotor(CROR) Aerodynamic noise Blade element momentum theory Viscosity vortex particle method Farassat’s formulation 1A 

摘      要：The Contra-Rotating Open Rotor(CROR)design confronts significant noise challenges despite being one of the possible options for future green *** efficiently estimate the noise emitted from a CROR,a three-dimensional unsteady prediction model based on the meshless method is *** unsteady wake flow and the aerodynamic load fluctuations on the blade are solved through the viscous vortex particle method,the blade element momentum theory and vortex lattice ***,the acoustic field is obtained through the Farassat’s formulation *** of this method is conducted on a CROR,and a mesh-based method,e.g.,Nonlinear Harmonic(NLH)method,is also employed for *** is found that the presented method is three times faster than NLH method while maintaining a comparable precision.A thorough parametric analysis is also carried out to illustrate the effects of rotational speed,rotor-rotor spacing and rear rotor diameter on the noise *** rotor speed is found to be the most influencing factor,and by optimizing the speed difference between the front and rear rotors,a notable noise reduction can be *** current findings not only contribute to a deeper comprehension of the CROR’s aeroacoustic properties but also offer an effective tool for engineering applications.