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LOADS CORRELATION OF A BELL M429 ROTOR USING CFD/CSD COUPLING

机译：使用CFD / CSD耦合负载铃声M429转子的相关性

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Rotor blade structural and aerodynamic loads for the Bell Model 429 helicopter are analyzed for level forward flight. Results are presented for experimental flight test and a progression of incremental analytical improvements. Analytical approaches begin with COPTER modal analysis and advance to DYMORE analysis coupled with COPTER aerodynamics. This is fol- lowed by DYMORE analysis coupled with lifting-line aerodynamics. Finally the analysis examines results for a loosely cou- pled DYMORE/OVERFLOW2 CFD analysis. The analytical assessment indicates that relatively high fidelity is needed for time-accurate prediction of rotor loads. The computational methodology for this work was developed under the "Methods for Improved Rotor Loads Prediction" project, a collaborative effort between industry, academia, and government researchers through the Vertical Lift Consortium. The methodology has been validated by correlation of UH-60A airloads and structural loads, and is now applied to the Bell M429 main rotor. Results show improved correlation of most structural loads, with the exception of blade chord bending and pitch link loads. Harmonic analysis indicates that the more sophisticated methodology improves the predicted 1/rev, 2/rev, and 3/rev loads, while harmonics above 3/rev are not significantly improved. DYMORE/OVERFLOW2 analysis shows promise to improve time history correlations, allowing for physical insight into simulation results.
机译：对钟模型429直升机的转子叶片结构和空气动力学载荷进行分析为前进飞行。结果出现了实验飞行试验和增量分析改进的进展。分析方法从转套模态分析开始，进入与转换器空气动力学相加的Dymore分析。这是通过与升降线空气动力学相加的Dymore分析来降低。最后，分析检查了松散的COMORE / OVERFLOY2 CFD分析的结果。分析评估表明，对转子负载的时准确预测需要相对高的保真度。这项工作的计算方法是在“改善转子负荷预测”项目的“方法方法”中，是通过垂直提升联盟的行业，学术界和政府研究人员之间的协作努力。通过UH-60A空降和结构载荷的相关性验证了方法，现在应用于钟罩M429主转子。结果表明，大多数结构载荷的相关性，除了刀片弦弯曲和俯仰链路负载外。谐波分析表明，更复杂的方法改善了预测的1 / Rev，2 / Rev和3 / Rev负载，而高于3 / Rev的谐波不会显着提高。 Dymore / Overflow2分析显示提高时间历史相关性的承诺，允许物理洞察仿真结果。

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