Steam flow control nozzle and design method and test system thereof

The invention relates to the field of oil and gas exploitation equipment, and discloses a steam flow control nozzle and a design method and a test system.The steam flow control nozzle is provided with a medium flow channel with a circular cross section, and the medium flow channel comprises a gradually-shrinking section (1), a throat section (3) and a gradually-expanding section (2) which are sequentially arranged; the design method comprises the steps of determining the throat diameter dc of the throat section (3); determining the adiabatic index gamma, the steam density rho r and the nozzle inlet pressure pr of the injected steam; the throat diameter dc is calculated according to the following equation set: # imgabs0 #, wherein Gmax is the maximum mass flow rate when the jetted steam passes through the throat section (3) at the sound velocity. 本发明涉及油气开采设备领域，公开了一种蒸汽流量控制喷嘴及其设计方法和测试系统，所述蒸汽流量控制喷嘴形成有具有圆形横截面的介质流道，该介质流道包括依次布置的渐缩段(1)、喉道段(3)和渐扩段(2)，所述设计方法包括确定所述喉道段(3)的喉道直径dc的步骤：确定被喷射蒸汽的绝热指数γ、蒸汽密度ρr和喷嘴入口压力pr；根据如下方程组计算