Deposition of Aerosol Particles in Contraction Fittings
Deposition of Aerosol Particles in Contraction Fittings
复制标题
气溶胶颗粒在收缩配件中的沉积
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
N. K. Anand
中科院分区：
文献类型：
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作者：
A. Muyshondt;A. Mcfarland;N. K. Anand
摘要在半角为12°、45°和90°的收缩管件中测量了颗粒沉积。结果表明，对于给定的收缩半角，收缩管件中的损失与参数Stk(1-AoAi)有很好的相关性，其中Stk是基于入口速度和出口直径的Pich-型斯托克斯数，Ao是出口面积，Ai是入口面积。根据实验结果建立的关联式允许预测收缩管件中的颗粒损失作为斯托克斯数、面积比和收缩半角的函数。相关性所基于的测试条件包括0.001≤Stk(1-Ao/Ai)≤100的范围。测试中使用的面积比Ao/Ai分别为0.062、0.215和0.571，测试条件包括基于下游港口直径1120到58,500的雷诺数。对收缩拟合法中气溶胶粒子的沉积过程也进行了数值模拟，数值结果与实验数据吻合较好。气流湍动是..。
ABSTRACT Particle deposition was measured in contraction fittings with half-angles of 12°, 45°, and 90°. It was found that for a given contraction half angle, the losses in a contraction fitting correlate well with the parameter Stk(1-Ao Ai ) where: Stk is a Pich-type Stokes number based on inlet velocity and outlet diameter, Ao is the outlet area, and Ai is the inlet area. A correlation developed from the experimental results allows prediction of the particle losses in contraction fittings as a function of Stokes number, area ratio, and contraction half-angle. Test conditions on which the correlation was based include a range of 0.001 ≤ Stk(1-Ao/Ai ) ≤ 100. Area ratios Ao/Ai used in the tests were 0.062, 0.215, and 0.571, and the test conditions encompassed Reynolds numbers based on downstream port diameter of 1120 to 58,500. The aerosol particle deposition in the contraction fitting was also modeled numerically and the numerical results show good agreement with the experimental data. Flow turbulence was...