排风均流器的阻力系数研究
Research on resistance coefficient of equalizers for air exhaust
摘要：
通过对排风均流器的实体实验与主风管内风速、风压的数值模拟计算，获得排风均流器在主风管中最大阻力系数的计算公式，并研究了迎风阀和背风阀的关闭度与阻力系数的关系。结果显示：当排风系统均匀排风时，主风管前半段排风均流器的背风阀全关，迎风阀关闭度逐渐减小，主风管后半段排风均流器的迎风阀全开，背风阀的关闭度总体上逐渐减小；若排风均流器背风阀全关，迎风阀关闭度逐渐增大时，其阻力系数先减小后增大；若排风均流器迎风阀全开，背风阀关闭度逐渐增大时，其阻力系数先增大后减小。
Abstract：
By physical experiment on the equalizer for air exhaust and numerical simulation on the wind speed and pressure in main air duct, obtains the calculation formula of maximum resistance coefficient of the equalizer for air exhaust in the main air duct, and studies the correlation between resistance coefficient and closing degree of windward valves and leeward valves. The results show that when the exhaust system uniformly discharges air, the leeward valves of equalizers for air exhaust in the first half of the main air duct are all closed, the closing degrees of windward valves gradually decrease, the windward valves of equalizers for air exhaust in the second half of the main air duct are all opened, the closing degrees of leeward valves are reduced gradually in the mass. If the leeward valve is fully closed, as the closing degree of windward valves gradually increases, the resistance coefficient is decreased first then increased. If the windward valve is fully opened, as the closing degree of leeward valves gradually increases, the resistance coefficient is increased at first then decreased.
Keywords:equalizer for air exhaust, resistance coefficient, leeward valve, windward valve, closing degree, wind speed, wind pressure