- 摘 要
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(1 石家莊鐵道大學大型結構健康診斷與控制研究所， 石家莊 050043；2 河北省大型結構健康診斷與控制重點實驗室， 石家莊 050043；3 石家莊鐵道大學土木工程學院， 石家莊 050043）
［摘要］既有串列雙方柱的繞流研究著重分析雙方柱的流態(tài)、整體阻力和升力等參數(shù)，對雙方柱表面的局部壓力分布關注較少。通過剛性模型測壓風洞試驗研究了串列雙方柱繞流的時均壓力分布特性。結果表明，下游方柱對上游方柱時均壓力的影響主要表現(xiàn)在小于臨界間距時的側面和背風面。上游方柱對下游方柱時均壓力的影響非常顯著，這種影響尤其體現(xiàn)在下游方柱的迎風面。定義干擾因子為上游（或下游）方柱不同分區(qū)的時均壓力系數(shù)與單方柱對應分區(qū)時均壓力系數(shù)的比值，討論了串列雙方柱各分區(qū)的時均壓力系數(shù)干擾因子隨間距的變化規(guī)律。
［關鍵詞］串列雙方柱； 時均壓力分布； 干擾因子； 風洞試驗
中圖分類號：TU311-3文獻標識碼：A文章編號：1002-848X(2020)01-0135-05
Study on time averaged pressure distribution features of flow around two square cylinders in tandem arrangement
Liu Xiaobing1,2， Chen Shuai3， Zhao Huitao3
(1 Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;2 Hebei Province Key Lab of Structural Health Monitoring and Control, Shijiazhuang 050043, China;3 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)
Abstract:In the study of the flow around the existing two square cylinders in tandem arrangement, the parameters of flow pattern, the overall resistance and the lift force of the two square columns were mainly analyzed, and the local pressure distribution on the surface of the two square columns was less concerned. The time averaged pressure distribution of the flow around two square columns in tandem arrangement was studied by the wind tunnel test of the rigid model. The results show that the influence of the downstream square column on the time averaged pressure of the upstream square column mainly lies in the side and leeward side when the distance is less than the critical distance. The influence of the upstream square column on the time averaged pressure of the downstream square column is very significant, especially in the windward side of the downstream square column. The interference factor was defined as the ratio of the time average pressure coefficient of the different zones of the upstream (or downstream) square column to the time averaged pressure coefficient of the corresponding zone of the single square column. The variation of time averaged pressure coefficient interference factor with the distance between columns was discussed.
Keywords:two square cylinders in tandem arrangement; time averaged pressure distribution; interference factor; wind tunnel test
*河北省自然科學基金項目(E2018210105)，河北省高等學?？茖W技術研究重點項目（ZD2019118），河北省大型基礎設施防災減災協(xié)同創(chuàng)新中心資助項目。
作者簡介：劉小兵，博士，副教授，Email: x_b_liu@126.com。
