| 摘要: |
| 整体式粒子分离器对涡轴发动机的气动乃至积冰都会有影响。为了获得涡轴发动机进口支板的积冰特性，以包含整体式粒子分离器的涡轴发动机进气机匣为模型，选取间断最大结冰条件，采用欧拉-欧拉法模拟了进气机匣内的空气-过冷水滴两相流场，并计算了支板表面的水滴撞击特性，再应用考虑水膜流动和蒸发的三维积冰模型对支板表面的积冰进行了模拟。计算结果表明，机匣进口的水滴有99.4%进入了扫气流道，而且结冰参数在支板前缘上游呈现出明显的周向不均匀性。对于主流道下游的4片支板，仅距离蜗壳起始位置最近的支板前缘局部受到显著的水滴撞击，最大水收集系数达到3.8，当积冰总时间为74s时，该支板表面最大积冰厚度约8mm，其余3片支板表面几乎没有水滴撞击和积冰现象。本文的研究结果可为考虑整体式粒子分离器影响的涡轴发动机进口支板的防冰设计提供依据。 |
| 关键词: 整体式粒子分离器 支板 水收集系数 积冰 |
| DOI：10.13675/j.cnki. tjjs. 180415 |
| 分类号:V231.1 |
| 基金项目:国家自然科学基金51506084;江苏省自然科学基金BK20150740国家自然科学基金（51506084）；江苏省自然科学基金（BK20150740）。 |
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| Numerical Simulation of Three-Dimensional Ice Accretion onStruts of Turbo-Shaft Engine with Inertial Particle Separator |
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1.College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China;2.Research Institute of Unmanned Aircraft，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
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| Abstract: |
| Inertial Particle Separator （IPS） plays an important role on aerodynamics and ice accretion of turbo-shaft engine. Ice accretion on struts of turbo-shaft engine with IPS was numerically simulated using a three-dimensional ice accretion model with water film flowing and evaporating， before which the two-phase flow of air-droplet and the impingement characteristics of droplets on struts were analyzed with the Euler-Euler method under the intermittent maximum icing conditions. The results indicate that 99.4% of the droplets from inlet flow into scavenging channel and the icing parameters upstream the struts show obvious circumferential non-uniform distribution. Only one of the four struts， whose leading edge is nearest to beginning of volute， suffers from remarkable droplet impingement with maximum water collection efficiency up to 3.8. The strut is covered with ice of which the maximum thickness was 8mm when the total time of ice accretion was 74s， while droplets impingement or ice accretion hardly occurred on the other three struts. The research findings can provide guidance to icing protection design on struts of turbo-shaft engine with IPS. |
| Key words: Inertial particle separator Struts Water collection efficiency Ice accretion |
