Experiment of Effect of Dissymmetry Throttling and Heating on Oscillation between Double Parallel Channels
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摘要: 研究不对称工况的参数有助于理解和消除平行通道管间脉动,提高系统的稳定性。在热工实验回路上,采用两根平行的圆管进行了不对称节流与不对称加热对管间脉动特性影响的实验研究。结果表明,随着进口节流不对称度增加,界限热功率增加,对脉动周期影响不大,脉动振幅存在非单值性变化;随着加热不对称度增加,界限热功率降低,对脉动周期影响不大,脉动振幅增大。通过整理分析,得到了不对称工况参数下的管间脉动界限判定公式。Abstract: The research of dissymmetric parameters are very useful to understand and eliminate the in-stability in parallel channels,and improve the stability of system.The experiment has been done in the ther-mohydraulics loop by double parallel round channels.With the inlet throttling or the degree of dissymmetry throttling increasing,the critical heating power of oscillation is increased,but the period of oscillation is not cillation is not affected,and the amplitude of oscillation is increased.The stability boundary of oscillation in double parallel channels has been finished,and the experimental correlation is obtained.affected,and nonlinear effects of amplitude of oscillation are observed experimentally.With the dissymmetry degree of heated power increasing,the critical heating power of oscillation is reduced,but the period of os-
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