单回路液氦脉动热管气液两相流数值模拟

Numerical simulation of gas-liquid two-phase flow in a single loop helium-based pulsating heat pipe

为了探究液氦脉动热管的传热机理,建立了单回路液氦脉动热管的二维数值模型。基于多相流VOF(Volume of Fluid)方法对该模型进行了数值求解,模拟了该液氦脉动热管的初始状态以及运行状态。其中初始状态为气液交替分布的饱和静止状态。运行状态为方向变化的脉动流动状态,流型为塞状流。分析了液氦脉动热管的流动与传热特性。

Based on the Volumeof Fluid( VOF) model, a two-dimensional numerical model was developed to investigate the heat transfer mechanism of the single-loop helium-based pulsating heat pipe. The model was numerically solved based on the Volume of Fluid(VOF) method, and the initial state and operating state of the helium-based pulsating heat pipe were simulated. The initial state is a saturated static state with alternate distribution of vapor plug and liquid slug. The running state is the pulsating flow with changing direction, and the flow type is the plug flow. In addition,the flow and heat transfer characteristics of the helium-based pulsating heat pipe were analyzed.