Computational aerodynamic analyses of rotorcraft main rotor blades are performed in both hover and forward flight. The open-source SU2 code is used for rotor performance prediction. The core of the code is the set of RANS equations, which are solved for determining the flow. In hover, both steady-state and time-accurate modelling techniques of varying complexity are used and assessed. Simulation specific parameters which have a significant influence on the solution are also addressed. In forward flight, the code is developed to include the main rotor blade kinematics which is a prerequisite for modelling a trimmed rotor. Two databases are used for the validation of the rotor performance prediction. The renowned Caradonna-Tung experimental tests of a model rotor are used to evaluate the pressure distribution along the blade during hover. The extensive aerodynamic and aeroacoustic data survey of the AH-1G Cobra helicopter is used to assess the pressure distribution at different advancing and retreating azimuth angles during forward flight. The prediction capabilities of the solver in terms of rotor performance are demonstrated and are overall in good agreement with the measured data.

翻译：对旋翼和前方飞行均对旋翼主要旋翼叶片进行计算空气动力学分析。对旋盘和前方飞行均使用开放源码SU2代码进行转子性能预测。代码的核心是一套RANS方程式,用于确定流流。在悬浮时,使用和评估复杂程度不同的稳态和时间精确建模技术。还涉及对溶液有重大影响的模拟具体参数。在前方飞行中,代码的开发包括主要转子刀叶动谱学,这是模拟三角旋轮子的前提条件。有两个数据库用于验证转子性能预测。著名的卡纳-通模型转子实验测试用于评估悬浮期间在刀片上的压力分布。AH-1G Cobra直升机的广泛空气动力学和空气分析数据调查用于评估前方飞行不同推进和后退方角度的压力分布。转子性能的预测能力得到了演示,而且总体上与测量的数据一致。