CAJ | 학술논문

给出一种适用于SK型静态混合器流场数值模拟的两级分块结构化网格划分方案和分块圆弧区点的极坐标方程。与常用的非结构四面体网格划分对比，两种方法划分网格数量相近时，两级分块结构化网格达到的迭代精度高于非结构化网格一个等级，而非结构化网格收敛所用时间约为结构化网格收敛所用时间的1．25倍；运用控制体积容积变化值对两种方法划分网格进行质量评估，结构化网格划分方法接近99％网格质量指标在1．0～2．0范围内，而非结构化网格仅接近60％网格质量指标在1．0～2．0范围内。通过实验测量对两种方法划分网格数值模拟结果进行对比验证，结构化网格计算结果与实验值更为接近，表明其可行性和准确性均优于非结构四面体网格划分。
급출일충괄용우SK형정태혼합기류장수치모의적량급분괴결구화망격화분방안화분괴원호구점적겁좌표방정。여상용적비결구사면체망격화분대비，량충방법화분망격수량상근시，량급분괴결구화망격체도적질대정도고우비결구화망격일개등급，이비결구화망격수렴소용시간약위결구화망격수렴소용시간적1．25배；운용공제체적용적변화치대량충방법화분망격진행질량평고，결구화망격화분방법접근99％망격질량지표재1．0～2．0범위내，이비결구화망격부접근60％망격질량지표재1．0～2．0범위내。통과실험측량대량충방법화분망격수치모의결과진행대비험증，결구화망격계산결과여실험치경위접근，표명기가행성화준학성균우우비결구사면체망격화분。
A dividing method of block structured grid of two level is proposed for the numerical simulation of the twist flow field in Kenics static mixer .When the similar grid quantity is gained for two dividing methods ,the block structured grid of two level and common unstructured tetrahedral grid ,the iterative accuracy of block structured grid of two level is one higher grade than the unstructured grid and the con‐vergent time for the former is only 80% of the latter .The evaluation of the grid quality between two methods is carried based on the cell volume change .The grid quality index 1 .0~2 .0 is used for evalua‐tion ,99% for the level of block structured grid and only 60% for common unstructured tetrahedral grid . The simulation results for the two methods are compared based on the experiment results .It shows that the simulation results from the structured grid agree with the experiments results well .The feasibility and accuracy of structured grid are better than the unstructured tetrahedral grid method .