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针对双模态超燃燃烧室内分别处于上游(高速、较低总温)和下游(较低速、高总温)不同热环境下十字交叉布置的支板,通过数值仿真,从材料选择、辐射影响程度及主被动热防护措施三方面研究了支板换热问题,并且研究了不同冷却水流速对支板前缘冷却性能的影响。结果表明:上游支板受气动加热影响比下游支板显著;对于所计算工况,考虑支板与气体之间的辐射作用后,上下游支板前缘温度均下降约150K;对下游支板进行主动冷却效果明显,冷却水流速为10m/s能满足长时间工作要求。
In the dual-mode super-combustion chamber, the supports are arranged in a criss-cross pattern in different thermal environments, ie, upstream (high speed, low total temperature) and downstream (low speed, high total temperature) respectively. The degree of impact and the main and passive thermal protective measures three aspects of the support plate heat transfer problems, and studied the different cooling water flow velocity on the cooling performance of the front edge of the support. The results show that the upstream support is more affected by aerodynamic heating than the downstream support. For the calculated working conditions, considering the radiation between the support and the gas, the temperature of the leading edges of the upstream and downstream supports drops about 150K. Active cooling effect is obvious, the cooling water flow rate of 10m / s to meet the long working hours.