If there are high temperature gradient between cool liner and hot liner, compressive plastic strain appear at that transient time, which lead to gas film wall bearing high tensile stress at high temperature . high tensile stress is one of main reasons which destroy combustor 分析表明,起動過程中由于熱傳導(dǎo)滯后引發(fā)的溫度梯度可以導(dǎo)致火焰筒氣膜唇邊在起動瞬間發(fā)生較大的壓縮塑性應(yīng)變,進而使得該區(qū)域在工作時承受較高水平的拉伸應(yīng)力,高的拉應(yīng)力會導(dǎo)致火焰筒萌生裂紋。