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楔形孔板流量计内多气泡的运动行为研究

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Indexed by:期刊论文

Date of Publication:2012-10-15

Journal:辽宁工程技术大学学报(自然科学版)

Included Journals:PKU、ISTIC

Issue:05

Page Number:715

ISSN No.:1008-0562

Key Words:孔板流量计;贴体坐标系;楔形;气液两相流动;混相;运动行为;同位网格;耦合问题;SIMPLE;密度值;

Abstract:针对楔形孔板流量计多个气泡的运动,建立了对孔板流量计内气液两相流动的数学模型.采用贴体坐标系下同位网格的SIMPLE算法解决速度与压力的耦合问题.利用贴体坐标下Level Set方法追踪两相界面的运动.通过模拟结果中节流截面含气律变化的分析,得出混相密度变化才是影响楔形孔板流量计测量精度的主要因素.因此,校正多相流的混相密度值是提高孔板流量计的测量精度,减小测量误差的最佳方法.

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