靶式流量计在火灾烟气流速测量中的应用

分析了几种传统气体流速测量仪器的原理及其应用于火灾烟气测速时的缺陷,介绍了靶式流量计的工作原理及应用靶式流量计测量火灾烟气流速的方法.利用三种不同的仪器,对水啧淋作用下自然排烟口的烟气流动速度进行了试测.实验结果证明,在处理低速、中温、高湿度和多颗粒杂质火灾烟气的测速问题上,与传统方法相比,靶式流量计具有更好的适用性和明显的优越性.

Velocity Measurement of Fire Smoke velocity by Target Flowmeter

Measurement theory and limitations of the traditional velocity measurement technic in fire smoke velocity were analyzed and presented. The target flowmeter was introduced to measure the velocity of the fire smoke flow under sprinkler spray. Experiments were carried out for measuring the velocity of smoke venting under the effect of sprinkler spray. Three different instruments including the target flowmeter, the pitot and the hot-wire anemometer were used and their effectiveness were compared. Result showed that the target flowmeter is more suitable and has several advantages on velocity measurement of the fire smoke flow, especially that with character of low velocity, medium temperature, high humidity and multiple impurities, than the traditional instruments.