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为保证涡轮盘满足适航规章的安全性要求,采用单向流固耦合数值方法,研究了转静系旋转盘腔以基比切夫数表示的盘缘加热热流密度的变化对冷却效果的影响,并依据旋转盘腔冷却问题的工程评价体系对旋转盘腔的冷却效果进行评价。研究结果表明:基比切夫数的变化对于旋转盘腔的流动结构和流动阻力基本没有影响,对盘面的换热效果影响也较微弱,仅引起转盘迎风面热流密度和温度的改变。同时,温度分布的改变导致了与温度梯度紧密相关的热应力水平发生变化。随着热流密度的增加,转盘整体应力水平上升,并且盘缘附近区域的等效应力提高的幅度大于中心区域。当基比切夫数高于临界值后,最大等效应力值从转盘中心转移到盘缘。基比切夫数的变化能够从部件承受能力和实际使用载荷两方面对涡轮盘的失效概率产生较大影响,因此,在涡轮盘腔的设计阶段,需要考虑基比切夫数对涡轮盘安全性的影响。
In order to ensure that the turbine disk meets the safety requirements of airworthiness regulation, the effect of the change of the heat flux density on the disk edge, expressed in terms of the Kimbicate number, on the cooling effect is studied by using the one-way fluid-solid coupling numerical method , And evaluate the cooling effect of the rotating disk chamber according to the engineering evaluation system of the cooling of the rotating disk chamber. The results show that the change of the number of Kippoevich has no effect on the flow structure and flow resistance of the rotating disk cavity, and has a weak influence on the heat transfer of the disk surface. At the same time, changes in temperature distribution lead to changes in the level of thermal stress that is closely related to the temperature gradient. As the heat flux density increases, the overall stress level of the turntable increases, and the equivalent stress in the region near the rim increases more than the center region. When the number of Kipparev above the critical value, the maximum equivalent stress transfer from the center of the turntable to the rim. The change of the number of Ki-Tabeffs can greatly affect the failure probability of the turbine disk from both the bearing capacity of the component and the actual service load. Therefore, in the design phase of the turbine disk cavity, Sexual effects.