Experimental investigation of a small-sized centrifugal compressor for a closed-brayton cycle gas turbine power system

Abstract

An experimental characterization of small-size centrifugal compressor for turbine-driven generator-compressor unit of a closed-Brayton Cycle gas turbine power plant is presented. Operating fluid is a mixture of inert gases. Bench equipment (replacement of pressure sensors and systems for collecting and processing signals) was upgraded for characterization to complete control of research. The paper describes the test facility, the equipment used and the method of research performance. Test runs were carried out in air compressor, with a cover of the throttle before the surge. Comparison with the calculated point restated at the speed of the experiments (30 000 rev / min) is presented. The influence of the physical properties of the working fluid on the performance of a centrifugal compressor at the calculated pressure ratio (1.75) is evaluated. Experimental research on Xenon and helium mixture (molar mass of argon) and argon at full throttle and varying speeds from 23700 to 30300 rpm is presented.

About the authors

A. N. Arbekov

Bauman Moscow State Technical University

Author for correspondence.
Email: novitskiybronislav@yandex.ru

Candidate of Science (Engineering)

Russian Federation

B. B. Novitskiy

Bauman Moscow State Technical University

Email: novitskiybronislav@yandex.ru

Junior Researcher

Russian Federation

References

  1. Arbekov A.N., Novitsky B.B. Experimental study of the characteristics of the small-scale centrifugal-flow compressor // Science and education. Electronic scientific and tech. journal. 2012. No. 8. P. 29. (In Russ.)
  2. Development of a centrifugal compressor (CC) turbogenerator unit compressor promising ZGTEU Ne = 1 ... 3 kW, running on natural gas. Report NIIEM BMSTU. Topic T1028, 2005. (In Russ.)
  3. Sherstuk A.N. Nasosy, ventilyatory i kompressory [Pumps, fans and compressors]. Moscow: Vysshaya shkola Publ., 1972. 344p.
  4. Vagraftik N.B. Spravochnik po teplofizicheskim svoystvam gazov i zhidkostey [Handbook of thermophysical properties of gases and liquids]. Moscow: Nauka Publ., 1972. 720 p.
  5. Paul K. Johnson. A method for Calculating Viscosity and Thermal Conductivity of a Helium-Xenon Gas Misture // NASA/CR-2006-214394, 2006. 20 p.

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