powder grain size meaning in Chinese

火药粒大小

Result of numerical simulation analyses powder grain size influence to velocity and temperature of flame , repeat with different grain size parameter simulation calculate , it has important meaning to accelerate and heat performance of spraying powder
根据数值模拟结果分析了粉末粒度对火焰焰流速度和温度的影响，用不同粒度参数重复模拟计算，这对喷涂粉末的加速和加热性能具有重要意义。