In this paper a number of numerical simulations were performed to determine the geometry and the process parameters influence on the large volumetric heat storage tank radial plate diffuser pressure drop. The tank is used in district heating systems. To reduce the possibility of a pressure drop in the diffuser below the water saturation pressure, three basic diffuser types were tested sharpe edge joint (SEJ), conical element (COE) and curved element (CUE). The analysis shows the differences and similarities between the diffuser types and their influence on the static and total diffuser pressure drop. The geometric similarity of the hermetic compressor radial valve with heat storage tank radial plate diffuser was used to validate the numerical model. The numerical calculation results were compared with the experimental measurements of the air pressure drop on the radial valves front plate taken from the literature. Good correlation between the calculation results and experimental measurements has been achieved. Along with mentioned, the diffuser model similarity effect is also presented and analyzed. The obtained results showed that, the static pressure drop remains the same for different diffuser sizes, when the geometric similarity of the diffuser is preserved.

本文进行了许多数值模拟，以确定几何形状和工艺参数对大容量储热罐径向板扩压器压降的影响。该水箱用于区域供热系统。为了减少扩散器中的压降低于水饱和压力的可能性，测试了三种基本的扩散器类型：尖锐边缘接缝（SEJ），圆锥形元件（COE）和弯曲元件（CUE）。分析表明，扩散器类型之间的差异和相似性及其对静态和总扩散器压降的影响。利用密闭式压缩机径向阀与储热罐径向板扩散器的几何相似性来验证数值模型。将数值计算结果与从文献中获得的径向阀前板上的气压降的实验测量值进行了比较。计算结果与实验测量值之间具有良好的相关性。与之同时，还介绍并分析了扩散器模型的相似性效果。获得的结果表明，在保持扩散器的几何相似性的情况下，对于不同的扩散器尺寸，静压降保持相同。