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通过对单双涡燃烧室进行热态试验研究,研究余气系数、进口气流参数对凹腔壁温分布的影响,并通过三维数值模拟对燃烧室及凹腔气流量进行计算,得到壁温分布规律,为燃烧室材料选择以及气量分配的后续优化做好铺垫。试验结果表明,单涡试验件的最高壁温出现在凹腔后壁面;燃烧室余气系数变化改变了双涡试验件最高壁温的位置;数值模拟结果比较准确的得到了驻涡燃烧室的气流量分布。
The single-double-vortex combustor was tested in hot state to study the effect of residual gas flow and inlet gas flow on the cavity wall temperature distribution. The three-dimensional numerical simulation was used to calculate the gas flow in the combustion chamber and the cavity, and the wall temperature distribution The law paves the way for the choice of combustion chamber material and subsequent optimization of gas distribution. The experimental results show that the maximum wall temperature of the single-vortex test specimen appears on the back wall of the cavity. The change of the residual gas coefficient of the combustion chamber changes the position of the highest wall temperature of the twin-vortex test piece. The numerical simulation result is more accurate. Air flow distribution.