燃气流量对脉动燃烧运行频率的影响

摘要

利用Helmholtz型脉动燃烧器,进行了不同燃气流量条件下的脉动燃烧运行实验,在3组不同尾管长度条件下,运行频率都随燃气流量的增大而增大.探究了燃气流量对脉动燃烧频率的影响,根据理论值与实测值的差异,提出Helmholtz型脉动燃烧器频率计算的修正公式,并对修正后的公式进行检验,实验值与理论值吻合度较好.%In order to further understand the frequency of Helmholtz pulse combustor, a Helmholtz type combustor was used to carry out the experiments in conditions of different gas flow rates. Through the experiments of three lengths tail pipe, frequency was all increased while the gas flow rate increased. The impact of gas flow rate on frequency was investigated, and the modification of theoretic formula was also proposed based on the difference between the theoretical and actual values. Compared with the experimental values, the results showed that the predicted values and the experimental values matched well.