Experience of designing a low-pressing turbocharger compressor using the modern version of a Universal modelling method

¹ Peter the Great St.Petersburg Polytechnic University St.Petersburg, Polytechnicheskaya, 29, Russia
² NPO “Turbotekhnika” Protvino, Zavodskoy passage, 4., Russia

^* Corresponding author: A_drozdi@mail.ru

Abstract

The paper presents the joint experience of the NPO “Turbotekhnika” and the R&D Laboratory “Gas Dynamics of Turbomachines” of SPbPU for designing a centrifugal compressor operating at pressure ratio 1.61 and a mass flow rate of 0.62 kg/s. The design was executed using the Universal modelling method and the inviscid quasi-three-dimensional calculation program 3DM.023. At the first step, by the preliminary design program, the stage dimensions were determined. The expected gas-dynamic characteristics are calculated. At the final design step, stator elements were offered by NPO “Turbotekhnika” and the configuration of the impeller blades was optimized based on the non-viscous quasi-three-dimensional calculations. NPO “Turbotekhnika” designed, manufactured and tested the 140E compressor at blade velocities 150, 200, 250 and 300 m/s. A comparison and analysis of experimental and calculated characteristics is presented. The design pressure ratio was calculated almost exactly for the design flow rate at a blade velocity of 300 m/s. The expected efficiency was confirmed. The mathematical model slightly overestimates the efficiency and the pressure ratio for the off-design flow rates.