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一、前言煤油-水二维轴对称、定常及非定常湍流射流是本实验的研究对象。在实验中,煤油在压力作用下喷入开始为静止状态的水中,从而形成了定常或非定常的煤油-水二相射流(以下分别简称为定常、非定常射流)。二相射流在工程上有着广泛的应用。如柴油机中燃油喷射所形成的射流就是一个重要的例子。本文介绍的实验,是作者关于可混及不可混流体非定常湍流射流的理论研究和实验研究的整体工作中的一部分,有关本领域研究工作的详细综述,本文所涉及的实验研究与理论研究的互相映证等,有兴趣的读者可查阅参考文献。
I. Introduction Kerosene - water two-dimensional axisymmetric, steady and unsteady turbulent jet is the object of this study. In the experiment, kerosene was injected under pressure into the quiescent state of water, resulting in a steady or unsteady kerosene-water two-phase jet (hereinafter referred to as stationary and unsteady jet, respectively). Two-phase jet has a wide range of applications in engineering. A jet fuel jet from a diesel engine is an important example. The experiment described in this paper is part of the author’s work on the theoretical and experimental research on unsteady unsteady turbulent jets that can be mixed with each other. For a detailed review of the work in this field, the experimental and theoretical studies involved in this paper Mutual proof, etc., interested readers can refer to the reference.