二甲醚火焰传播速度的实验研究

Experimental Study on Laminar Flame Speeds of Dimethyl Ether and Air Mixtures

用对冲火焰法测量了二甲醚的层流火焰传播速度.在室温和常压下得到了当量比为0.76～1.76的火焰速度,并与文献中其他方法测量得到的结果进行了比较,表明本实验所得二甲醚的火焰传播速度相对更为合理.实验得到二甲醚的火焰传播速度最大值约为54cm/s.

The laminar flame speeds of dimethyl ether (DME) and air mixtures for equivalence ratio from 0.76 to 1.76 at room temperature and atmospheric pressure have been determined by first measuring the flame speeds with stretch and then linearly extrapolating these values to zero stretch, using the symmetrical, adiabatic, counter-flow arrangement. The result is compared to those determined by other methods; and the comparison shows that the present result is reliable. In our experiment the maximum flame speed of dimethyl ether and air mixture without stretch is about 54 cm/s.