基于热障涂层保护的双向正交支撑板优化设计

Optimal Design of Two-way Orthogonal Sustaining Plate Sprayed by Thermal Barrier Coating

目的研究适合大秒流量、采用自由装填药柱的斜置喷管固体火箭发动机的药柱支撑板结构。方法在对比分析常规的自由装填药柱的支撑板结构基础上,提出采用双向正交结构涂覆氧化锆热障涂层方案,利用仿真计算方法对支撑板的结构参数进行优化,通过发动机点火试验对4种设计方案进行验证分析。结果采用热障涂层保护的8×8双向正交结构支撑板在点火试验过程中,具有较大的通气面积、较高结构强度及耐烧蚀性,可满足该发动机的使用要求。结论双向正交并采用热障涂层保护既能具有高强度,也具有优良的耐烧蚀性。

Objective In order to design grain sustaining plate structure of free filling grain solid rocket motor （SRM） with canted nozzle suitable for large flow. Methods The new two-way orthogonal sustaining plate sprayed thermal barrier coating was proposed based on contrastive analysis of sustaining plate structure for free filling grain. Structure parameters of the sustaining plate were optimized through simulating calculation and the 4 designing schemes were verified and ana-lyzed through ignition experiments of engine. Results The 8-8 two-way orthorhombic sustaining plate sprayed with ther-mal barrier coating had large breathing area, high structural strength and ablation resistance. It met the requirement of using the engine. Conclusion The new two-way orthogonal sustaining plate sprayed with thermal barrier coating can pro-vide strong structure strength as well as better thermal ablation.