【摘要】 耗散结构在流体动力学中存在 ,两相自然循环非能动系统稳定性是耗散结构在多相流体动力学中的问题 ,运用分岔理论及其DERPAR数值方法给出系统随参数变化的演化过程的静态分岔解图图谱。以静态分岔解图呈现的迟滞现象 (多平衡解 )定义了输热能力限、静态漂移稳定性准则、稳定性裕度、比质量流量输热能力、分岔现象消失—呈单值性的临界参数区的系统演化的自组织特性的物理本质—系统的稳态和时间相关态随着特征参数的演化。用低压下的实验数据与理论计算分析进行比较 ,变化趋势吻合 ,尚需进一步验证。更多还原

【Abstract】 The formation of dissipative structures has long been known to occur in hydrodynamics. The two phase natural circulation and passive system (TPNCPS) instability is a disspative structure problem in multiphase hydrodynamics. The spectrum of the static bifurcation solutions (SBS) of TPNCPS through the variation of a parameter (one or more) has been derived in terms of Bifurcation Theory and DERPAR Numerical Method. Based on the appearance of Thermal Siphon Hysteresis, the transprot heat capability, static excursion criterion, stationary margin, transport heat capability of specific mass flow rate and the disappear of bifurcation the transition of single valued region with the change of parameter have been defined. Such phenomena are the problems of describing self organization, i. e. detailed study of stationary and/or time dependent status evolving with changes of characteristic parameters. A comparison between computational curves and low pressure experimental data shows the tendency of evolutionary processes compatibly. The further tests is needed.更多还原