【摘要】 在使用旋转射流驱散上隅角瓦斯前,有必要确定出旋转射流有效作用距离。用热空气进行旋转射流驱散煤矿工作面上隅角瓦斯的模拟实验,可以由热成像图片得到旋转射流有效作用距离。实验结果表明:旋转射流的有效作用距离与流速比成正比;与平直的平行横流相比,弯曲的平行横流的绕流作用更强,射流在弯曲的平行横流中弯曲得更厉害。更多还原

【Abstract】 <Abstrcat>Before using rotary jet flow to dilute gas in the upper corner of a face, it is necessary to determine an effective distance which can be obtained by thermal image in simulating test of using rotary jet flow of heat air to dilute upper corner gas of the face. The test result shows: the effective distance has a direct proportion to the velocity ratio; and the bended parallel lateral flow has more action than the straight one.更多还原