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首页> 外文期刊>Journal of the American Helicopter Society >Application of Computational Fluid Dynamics/Computational Structural Dynamics Coupling for Analysis of Rotorcraft Airloads and Blade Loads in Maneuvering Flight
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Application of Computational Fluid Dynamics/Computational Structural Dynamics Coupling for Analysis of Rotorcraft Airloads and Blade Loads in Maneuvering Flight

机译：计算流体动力学/计算结构动力学耦合在机动飞行中旋翼航空器载荷和叶片载荷分析中的应用

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This paper presents coupled calculations of both the airloads and structural loads for the UH-60A main rotor during the UTTAS pull-up maneuver performed under the NASA/Army UH-60A Airloads Program. These calculations were performed using OVERFLOW-2, a computational fluid dynamics (CFD) solver, coupled to the Rotorcraft Comprehensive Analysis System (RCAS), a rotorcraft comprehensive analysis. For time-varying maneuvers, the two codes were tightly coupled and exchanged airloads and structural deflections at every time step. The coupled solution methodology gives improved airload prediction because of the ability to model three-dimensional transonic effects on the advancing blade, stall events on the retreating blade, as well as the aeroelastic deformations. Correlation with data for both the airloads and structural loads is reasonably good. Control load predictions also show good correlation with data, which is a substantial improvement over conventional analyses. A quasisteady loosely coupled approximate solution was also examined and was found to give good airload and structural load predictions, for this relatively slow maneuver.
机译：本文介绍了在NASA /陆军UH-60A空载计划下进行的UTTAS上拉演习期间，UH-60A主旋翼的空载和结构载荷的耦合计算。这些计算是使用OVERFLOW-2（一种计算流体动力学（CFD）求解器）与旋翼飞机综合分析系统Rotorcraft综合分析系统（RCAS）耦合进行的。对于随时间变化的演习，两个代码紧密耦合，并在每个时间步交换空载和结构变形。耦合解决方案方法能够对前进叶片上的三维跨音速效应，后退叶片上的失速事件以及气动弹性变形进行建模，从而改善了空载预测。空气载荷和结构载荷与数据的相关性都很好。控制负荷预测也显示出与数据的良好相关性，这是对传统分析方法的重大改进。还研究了准稳态松散耦合近似解，发现对于这种相对较慢的机动，它可以提供良好的空气载荷和结构载荷预测。

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