【摘要】 重型燃气轮机侧向进气道结构复杂，易导致较高的总压损失和出口旋流畸变，进而影响燃气轮机性能。利用粒子图像测速(PIV)与探针测量方法，在质量流量为2.0,2.4和3.0 kg/s工况下，测量了进气道出口总压和气流速度分布，并通过数据对比验证了试验的可靠性。结果表明：尽管出口流场总体均匀，但局部存在反旋涡现象，不同流量下，最大气流角约为12°;旋流畸变强度随流量变化不大，平均为0.07;总压损失与流量呈线性关系，其中边界层总压损失占比60%,主流区域的总压损失主要由支撑板尾迹和反旋涡引起。更多还原

【Abstract】 The radial intake duct of heavy-duty gas turbine, due to its complex structure, often results in higher total pressure loss and outlet swirl distortion, which can adversely affect the performance of gas turbine. The flow loss and outlet flow field characteristics of such intake ducts were investigated by the experimental method. Using particle image velocimetry(PIV) and probe measurement method, the total pressure and flow velocity distributions at the outlet of intake duct were obtained under the condition of mass flow rates of 2.0, 2.4 and 3.0 kg/s, and the reliability of the experiments was validated through data comparison. Results show that although the overall outlet flow field is relatively uniform, local reverse vortex phenomena are observed, with maximum flow angle reaching 12° at different flow rates. The swirl distortion intensity remains relatively unchanged with varying flow rates, averaging 0.07. Total pressure loss exhibits a linear relationship with mass flow rate, with total pressure loss of boundary layer accounting for 60% of the total. Total pressure loss in the main flow region is primarily attributed to the wake of the support struts and reverse vortices.更多还原