Modares Mechanical Engineering

Modares Mechanical Engineering

Investigation of Continuous Changes in Output Speed and Torque in a Multi-Pass Radial Turbine

Authors
seyed mahmood farmani 1
Majid Alitavoli 2
Hamid reza Nazif 3
1 University of guilan
2 University oof guilan
3 imam khomeini international University
10.48311/mme.2025.24035
Abstract
In this research, the design and construction of an innovative multi-pass radial turbine for use in a torque converter and the aim of investigating its performance in collision with a fluid jet have been studied experimentally and analytically. In the experimental method, the innovative design of a multi-pass radial turbine has been used to increase the fluid energy inside the turbine due to the reduction of centrifugal force in the inlet channels located at the smaller radii of the turbine. The turbine has been built in accordance with the software geometry. The number of revolutions and torque generated in the hydraulic pump coupled to the turbine shaft has been measured after the fluid jet collides with the turbine openings. Experimental modeling seeks to show the continuity of the torque transfer mode due to the change in the fluid entry path to the openings on the smaller radius of the turbine. An analytical model has been developed to investigate the changes in turbine speed and torque under the influence of changes in turbine radius and fluid mass flow rate, taking into account the effect of centrifugal force through the governing equation of the torque converter and the Euler equation. The results show that the amount of centrifugal force is reduced by the opening located in a smaller working radius, and the losses of the fluid impact front inside the turbine are reduced. The transmission torque of 70% is provided in the system under study at high speeds
Keywords
Multi-Pass Radial Turbine
Continuous Speed and Torque
Centrifugal Force
Torque Transmission
Efficiency

Subjects

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Modares Mechanical Engineering
Volume 25, Issue 6
June 2025
Pages 333-343