中文摘要：

提出热源周围空气不稳定的热量与声压、脉动速度之间关系的新假设。在无外加强制作用下实现里克管脉动工况数值模拟，与里克管作为自激热声装置的实际情况一致。以外流场处理方法研究里克管内流场问题，进一步研究里克管的管口效应，以降低由它引起的高强度噪声，为里克管型强化脉动燃烧、强化传热装置产品化打下基础。通过实验，验证了模拟的正确性，并分析了模拟中出现的物理现象。图6表2参7

英文摘要：

A new hypothesis concerning the relationship between unsteady heat absorption of air surrounding a heat source and sonic pressure as well as the air＇s pulsating rapidity. Numerical simulation results of Rijke tubes, pulsating without forced triggering, agree with actual conditions of Rijke tubes acting as self-excited thermal-sonic devices. The flow field within Rijke tubes is here being studied together with the surrounding flow field. A foundation is laid for further research on the nozzle effect of Rijke tubes, on ways for reducing its noise level ways for effectuating intensification of Rijke tube type pulsating combustion and for developing the heat transfer installation into a product. Experimental results vindicated the correctness of the simulation and the physical phenomena displayed by simulation results are analyzed. Figs 6, tables 2 and refs 7.