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Comparison of Three Coaxial Aerodynamic Prediction Methods Including Validation with Model Test Data

机译：包括模型测试数据验证在内的三种同轴空气动力学预测方法的比较

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摘要

The paper presents the application of three aerodynamic prediction methods, covering a wide spectrum of sophistication and computational efficiency, to a model-scale coaxial rotor with highly twisted blades. The first method is based on blade-element momentum theory. The second is based on a free-vortex wake model, and the third is a computational fluid dynamics analysis based on Navier-Stokes solutions on structured grids. The results are compared with experimental data from model rotor tests in hover. There is generally good agreement between theory and experiment for the quantities considered, namely rotor thrust, torque, and inflow, but the results from the three methods differ in several important details. The best approach to coaxial rotor aerodynamic analysis judiciously combines the three predictive capabilities depending on the level of detail desired and uses a more sophisticated approach to calibrate and correct a simpler one.
机译：本文介绍了三种空气动力学预测方法在具有高扭曲叶片的模型级同轴转子上的应用，涵盖了复杂性和计算效率的广泛范围。第一种方法基于叶片元素动量理论。第二个是基于自由涡流模型，第三个是基于结构化网格上的Navier-Stokes解决方案的计算流体动力学分析。将结果与悬停时模型转子测试的实验数据进行比较。理论和实验之间对于所考虑的量，即转子推力，转矩和流入量，通常有很好的一致性，但是三种方法的结果在几个重要的细节上有所不同。同轴转子空气动力学分析的最佳方法根据所需的详细程度明智地结合了三种预测功能，并使用更复杂的方法来校准和校正更简单的方法。

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  • 来源
    《Journal of the American Helicopter Society》 |2014年第3期|032006.1-032006.14|共14页
  • 作者

    Ondrej Juhasz; Monica Syal; Roberto Celi; Vladimir Khromov; Omri Rand; Gene C. Ruzicka; Roger C. Strawn;

  • 作者单位

    Department of Aerospace Engineering, University of Maryland, College Park, MD;

    Department of Aerospace Engineering, University of Maryland, College Park, MD;

    Department of Aerospace Engineering, University of Maryland, College Park, MD;

    Faculty of Aerospace Engineering, Technion, Haifa, Israel;

    Faculty of Aerospace Engineering, Technion, Haifa, Israel;

    U.S. Army Aeroflightdynamics Directorate (AMRDEC)Ames Research Center, Moffett Field, CA;

    U.S. Army Aeroflightdynamics Directorate (AMRDEC)Ames Research Center, Moffett Field, CA;

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