Email this article About improvement of the scheme of correction of frequency characteristics of probes for measurement of pulsations of pressure in gte
- Authors: gimadiev A.1, Bystrof N.1, Safin A.1
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Affiliations:
- Samara university
- Issue: Vol 5, No 2 (2019): 21.06.2019
- Pages: 18-25
- Section: Articles
- Published: 21.06.2019
- URL: https://dynvibro.ru/dynvibro/article/view/7397
- DOI: https://doi.org/10.18287/2409-4579-2019-5-2-18-25
- ID: 7397
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Full Text
Abstract
It is known that pressure pulsations affect the performance of power plants, including a gas turbine engine, reducing the reserve of gas-dynamic stability of the compressor, creating conditions for oscillatory combustion in the combustion chamber. When fine-tuning the engine in the context of the pressure pulsations there is need for measuring means working at extreme temperatures and vibrations. The most acceptable of these means is a probe consisting of a supply waveguide, a pressure pulsation sensor and a corrective element in the form of a long line. However, in the low frequency region there is an uneven amplitude-frequency characteristic of the probe, due to the influence of the reflected pressure waves from the closed end of the long line. It is proposed to install an acoustic RC-filter with resistance equal to the wave resistance of the long line at the output of a long line. The paper theoretically shows that such an improvement of the probe allows to expand the frequency range of measurement of pressure pulsations. The material of the article will be useful for specialists who develop and use tools for measuring pressure fluctuations in extreme conditions, for example, when developing gas turbine engines.
About the authors
Asgat gimadiev
Samara university
Email: gimadiev@gmail.ru
Doctor of technical science,
Professor, Department of Automatic Systems of Power Plants Russian Federation
Nikolay Bystrof
Samara university
Author for correspondence.
Email: bystrof-nd@yandex.ru
Professor, Department of Automatic Systems of Power Plants Russian Federation
Arthur Safin
Samara university
Email: artursafin1988@gmail.com
Associate Professor, Department of Automatic Systems of Power Plants
Russian FederationReferences
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