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基于环周进水型汽-液两相喷射器流动机理的分析,研究并发展了一种新的喷射器优化的方法。采用在圆柱段混合室壁面上增加侧向孔的方式,使外界环境的低温水通过侧向孔进入混合室,形成二级引射,从而提高喷射系数。设计了以湿蒸汽为工作蒸汽的实验台和多喷嘴喷射器作为实验元件,湿蒸汽的压力在0.15～0.4 MPa范围内,湿蒸汽干度在0.25～1范围内,实验比较了优化前、后试件的性能,结果表明:在相同的蒸汽干度下,喷射系统实现了阶跃性的增长,且随蒸汽干度的增大,喷射系数提高的幅度增加,验证了采用该优化方法提高喷射性能是可行的。
Based on the analysis of the flow mechanism of the annular feedwater vapor-liquid two-phase injector, a new method of injector optimization is developed and developed. Adopting the way of adding lateral holes on the wall of the mixing chamber of cylindrical section, the low temperature water in the external environment enters into the mixing chamber through the lateral hole to form the secondary ejecting, so as to improve the ejecting coefficient. Experimental bench with wet steam as working steam and multi-nozzle injector were designed as experimental components. The pressure of wet steam was in the range of 0.15-0.4 MPa and the dryness of wet steam was in the range of 0.25-1. The experiments were compared before and after optimization The results show that the injection system achieves a stepwise increase under the same steam dryness, and the increase of the injection coefficient increases with the increase of the steam dryness, which verifies that the optimization method is used to enhance the injection Performance is feasible.