催化点火器高空点火性能的实验研究

介绍国产催化点火器高空点火性能模拟试验，主气流温度为５００℃左右、加力室压力为０．０４—０．１２ＭＰａ，对催化点火器的着火延迟时间和贫富油点火极限进行了测量。试验结果表明：当飞行高度为１７０００—１７５００ｍ，飞行马赫数Ｍａ＝１．０时，催化点火器可以正常点燃某型发动机加力燃烧室。

AN INVESTIGATION ON IGNITION PERFORMANCE OF A CATALYTIC IGNITER AT HIGH ALTITUDE

An experimental investigation on performance of a catalytic igniter made of platinum/rhodium catalyst has been conducted in a turbofan engine afterburner.Its ignition delay was measured under the conditions:the static pressure of 0 04-0 115 MPa;the inlet total temperature of 673-773 K;the velocity at the lip of igniter cone λ =0 20-0 36.The investigation simulates the operation of the engine's afterburner when aircraft flies at an altitude of 18000 m and the Mach numer of 1 0.The experiments on performance of the igniter for igniting of 1100 runs at normal pressure were also conducted to verify the longevity of the catalytic igniter.