旋流式煤氧枪气流流场的试验及数值模拟

按照相似理论的基本原则,设计和确定了用于工业试验煤氧枪的冷态试验模型。采用一维多普勒激光测速仪,测量了旋流流场的轴向速度分布,根据LDV测量值,建立了描述所给旋流场的数学模型。文中指出以余弦函数形式来逼近回流区域内的轴向速度,能获得较现有其它方式更满意的效果。文中还讨论了旋流流场的其它空气动力学问题。

Experiment and Numerical Simulation on the Gas Flow Field of the Swirl Pulverized Coal-Oxygen Burner

Accorhing to the analogue theory, a cold experimental model for simulating the swirl pulverized coal-oxygen burner used in the industrial test was designed and established.By one dimension LDV, the distribution of axial velocity in the swirling field given was measured. Depending upon the measurement datum by the LDV, the mathematic model for showing the swirling field given was developed, and the measurement value was in good agreement with the calculation value of the model. It is considered that the approch was more satifactory than other methods at present as the axial velocity distribution in the reverse flow area was shown by cosine function. Hence, the some problems on the gas dynamics of the swirling field was also discussed in this paper.