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Helicopter Rotor Performance Loss Prediction For Ice Accretion

机译：直升机旋翼性能损失对积冰的预测

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Ice accretion of rotor limits the helicopter use, so it’s significative to study the helicopter rotorrnperformance loss for ice accretion. CFD is a effective method to research the icing progress.rnBased on the water droplet flow field conception, the Eulerian two-phase flow model for thernair flow containing water droplets is employed to calculate the water droplet collectionrnefficiency. Then the iced progress is simulated with the Gresho thermodynamics model. Therncalculation result is in good agreement with ice wind tunnel experimental data available,rnindicating that the method is effective. It’s another important research field to cut out therncalculation condition, and the continuous and intermittent icing envelope is based on CCARrn29, Appendix C. The helicopter weight, speed and altitude are on consideration. The bladernsection effective α-Ma loops are described by full helicopter trim, and water droplet collectionrnand icing characteristic is simulated using the present method. By CFD the iced airfoilrnaerodynamics characteristic and iced rotor performance is predicted. The productions of thisrnpaper can be used to direct the icing protection area and control rule design.
机译：旋翼的积冰限制了直升机的使用，因此研究直升机旋翼的性能损失对于积冰具有重要意义。 CFD是研究结冰过程的有效方法。基于水滴流场的概念，采用含水滴的欧拉两相流模型计算水滴的集水效率。然后用Gresho热力学模型模拟结冰的过程。计算结果与现有冰风洞实验数据吻合较好，表明该方法是有效的。消除计算条件是另一个重要的研究领域，连续和间歇性的结冰包络基于CCARrn29（附录C）。直升机的重量，速度和高度均在考虑之列。通过全直升机纵倾描述叶片截面积有效的α-Ma环，并使用本方法模拟了水滴的收集和结冰特性。通过CFD预测了冰翼型空气动力学特性和冰转子性能。该产品的生产可用于指导结冰保护区域和控制规则设计。

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