大双螺旋稳压器喷雾头阻力特性数值分析研究

Numerical Analysis of Resistance Characteristic of Large-scale Double-helix Pressurizer Sprayer

通过计算流体力学(CFD)方法,研究了大双螺旋稳压器喷雾头内部的流动情况,分析了小混合室、大混合室的结构和螺旋流道螺旋角对喷雾头流量系数的影响。通过分析得到,混合室结构中,最终影响流量系数的因素为混合室的出口直径;小混合室出口直径越大,流量系数越大;大混合室出口直径越大,流量系数越小;在所研究的范围内,大混合室出口直径对流量系数的影响更明显;内、外芯螺旋流道的螺旋角越大,流量系数越大。

Having CFD method applied to investigate the fluid motion within double-helix pressurizer sprayer and to analyze the structure effect of big and small mixing chambers and the helical angle of the flow pass on sprayer＇ s flow coefficient to show that, of the mixing chamber structure, the factor which influencing flow co- efficient much is the outlet diameter of the chamber; the small mixing chamber＇ s larger outlet diameter can incur a bigger flow coefficient and the larger outlet diameter of the big mixing chamber brings about a smaller flow coefficient; and the outlet diameter of big mixing chamber influences the flow coefficient obviously and bigger helical angle in the external and inner spiral pass can bring about greater flow coefficient.