The current paper presents the validation of some hypotheses used for developing a one-dimensional twin-entry turbine model with experimental measurements. A Laser Doppler Anemometry (LDA) technique has been used for measuring the axial Mach number and for counting the number of particles downstream of the rotor outlet. These measurements have been done for different mass flow ratio (MFR) and reduced turbocharger speed conditions. The flow coming from each turbine entry does not fully mix with the other within the rotor since, downstream of the rotor, they can still be differentiated. Thus, the hypothesis of studying twin-entry turbines as two separated single-entry turbines in one-dimensional models is corroborated. Moreover, the rotor outlet area corresponding to each flow branch has linear trends with the MFR value. Therefore, the rotor outlet effective area used for one-dimensional models should vary linearly with the MFR value.

当前论文通过实验测量验证了用于开发一维双入口涡轮机模型的一些假设。激光多普勒风速计 (LDA) 技术已用于测量轴向马赫数和计算转子出口下游的粒子数。这些测量是针对不同的质量流量比 (MFR) 和降低的涡轮增压器速度条件进行的。来自每个涡轮机入口的流不会与转子内的另一个完全混合，因为在转子下游，它们仍然可以区分。因此，证实了将双入口涡轮机作为一维模型中的两个分离的单入口涡轮机来研究的假设。此外，每个流支对应的转子出口面积与MFR值呈线性趋势。所以，