The prediction of transonic loading advancing helicopter rotors
The prediction of transonic loading advancing helicopter rotors
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发表时间：
1986-11
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通讯作者：
R. Strawn;C. Tung
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作者：
R. Strawn;C. Tung
翻译后摘要：两种不同的方案，包括转子尾流的影响转子载荷的有限差分预测。第一个公式包括通过叶片表面入流规范的尾流效应。这种方法足够简单，可以将全势有限差分转子代码耦合到转子尾流和叶片运动的综合积分模型。耦合包括在两个计算机代码之间传输适当的载荷和流入数据。两个先进的转子的情况下，与实验数据的结果进行了比较。本文的第二种旋翼尾迹模拟方案是计算非定常叶片-涡干扰的“分裂势”公式。离散涡场被引入到一个三维的，保守的，全潜力的转子代码。计算机预测与两个实验叶片涡相互作用的情况进行了比较。
Abstract : Two different schemes are presented for including the effect of rotor wakes on the finite-difference prediction of rotor loads. The first formulation includes wake effects by means of a blade-surface inflow specification. This approach is sufficiently simple to permit coupling of a full-potential finite-difference rotor code to a comprehensive integral model for the rotor wake and blade motion. The coupling involves a transfer of appropriate loads and inflow data between the two computer codes. Results are compared with experimental data for two advancing rotor cases. The second rotor wake modeling scheme in this paper is a'split potential' formulation for computing unsteady blade-vortex interactions. Discrete vortex fields are introduced into a three-dimensional, conservative, full-potential rotor code. Computer predictions are compared with two experimental blade-vortex interaction cases.