径流式涡轮的蜗壳不仅从单进口或双进口通道收集废气,而且加速气流并在涡轮叶轮的进口处形成所需的预旋。本文对一单进口通道的无叶蜗壳进行了试验研究,应用激光测速仪测取了其内部气流速度和气流角,采用三孔和五孔探针测量了蜗壳出口速度和气流角,并用扫描阀和单通道压力传感器测得了蜗壳表面静压。试验结果提供了蜗壳内部流动的过程及细节,可用于蜗壳设计的进一步发展,并且确认了所研究的理论三维粘性流计算方法。 The radial turbine’s volute not only collects the exhaust gases from the single-inlet or dual-inlet passages but also accelerates the flow and creates the desired pre-rotation at the turbine impeller inlet. In this paper, the non-leaf volute case of a single inlet channel was studied. The internal gas velocity and gas flow angle were measured by laser gun, and the outlet velocity and gas flow angle of the volute were measured by three-hole and five-hole probes. Sweep valve and single-channel pressure sensor measured the volute surface static pressure. The experimental results provide the process and details of the flow inside the volute and can be used for the further development of volute design, and confirm the theoretical three-dimensional viscous flow calculation method.