Virtualization in Chimmotology Investigations
https://doi.org/10.1134/S2304487X19060051
Abstract
Qualification tests were interpreted as specific case of semi–natural experiment where laboratory plant takes part of environment physical model with studied object. In this situation virtualization represents transfer from physical to mathematical models and allows virtual qualification, i. e. qualification test implementation in form of numerical experiment. Virtualization permits performing extrapolation of laboratory results to normal exploitation conditions and recalculation of these conditions to qualification experiment parameters. Virtualization effectiveness demonstrated at math models optimization, qualification experiments correction and their results forecasting, at criteria models application for qualification experiments adequate parameterization on exploitation characteristics. Models of internal combustion engine were created for investigation of tribological and chimmotolologcal factors influence on engine dynamics end effectiveness. They are based on balance relation and differ with method of cylinder pressure imitation only. Friction influence was based on Gersy–Streebeck curve approximation and its use for friction coefficient calculation in dependence of Sommerfeld’s number. Basing on anti–wear properties investigation criteria model of volume wear was developed and used for wear evaluation at specified conditions. It was proposed to use this model for wear forecast at extreme conditions and forming of corresponding qualification normative. For oils density approximation model – oriented identification was proposed to use. Toward this end, modified algorithm was built which is based on law of corresponding states. In contrast to usual algorithm based on correlation tables use modified algorithm uses density presentation in form of power function of oil pressure and temperature. It was shown that for light oils modified algorithm provides better precision in comparison with usual one.
Keywords
qualification tests,
semi-natural experiment,
numerical experiment,
physical model,
virtualization,
virtual qualification,
criteria model,
Gersy–Streebeck curve,
Sommerfeld’s number,
anti-wear properties,
qualification normative,
identification,
oils,
law of corresponding states,
compressibility factor
About the Author
A. A. Moiseev
NPP Technos-RM (Technos-RM Research and Production Enterprise)
Russian Federation
Russian Federation
141002
Mytischi
References
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Review
For citations:
Moiseev A.A. Virtualization in Chimmotology Investigations. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2019;8(6):553-568. (In Russ.) https://doi.org/10.1134/S2304487X19060051
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