Abstract— <p>The paper examines modern marine turbine units, which differ in terms of purpose, type, design features, materials, and working bodies. This diversity is due to the use of innovative information technologies, from the preproduction process to the final product release. It is noted that at the turbomachinery design stage it is necessary to take into account the external characteristics such as power, angular velocity, shaft torque, and efficiency, which is characterized by losses in the turbine stage, etc. It is emphasized that in an effort to reduce losses in the turbine stage, engineers resort to the creation of low-consumption partial turbines, in which the losses from partial admission ratio are significantly reduced due to changes in the design parameters. An example of such a design is a turbine with partial blading of the runner. The study object is a low-consumption centripetal turbine with partial blading of the runner with varying degrees of partial admission ratio. The study subject is the gas dynamic characteristics of the flow part of the nozzle diaphragm and the runner of a low-consumption centripetal turbine. The main objective of the study is to compare the velocity coefficients of the nozzle diaphragm and the runner of the turbine stage. It is noted that low-consumption turbines are characterized by their small size, which does not allow for a high-quality physical experiment. In the present paper the research method is numerical simulation of gas flow using computational gas dynamics. The paper presents graphical dependences of the velocity coefficients of the nozzle diaphragm and the runner as a function of <i>u</i>₁/<i>C</i>₀ at varying degrees of partial admission ratio. The unsatisfactory convergence of the velocity coefficients has been established and recommendations for improving the convergence of the gas dynamic computation have been proposed.</p>