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Acta Scientific Computer Sciences

Short Communication Volume 2 Issue 9

Analytical Solution of the Problem of Stationary Subcritical Flow of a Gaseous Heat Carrier in the Branches of Pipelines of Heat Exchangers

IE Lobanov*

Department of Computer Science, Moscow Aviation Institute, Russia

*Corresponding Author: IE Lobanov, Department of Computer Science, Moscow Aviation Institute, Russia.

Received: July 07, 2020; Published: August 19, 2020

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 The choice of the model of the flow of gaseous coolant in the heat exchanger tubing and the proper discharge of the equality of similarity criteria for physical modeling due to the complexity of design and choice of model for the computational method is due to the allowable degree of proximity to the real ones-the value and complexity of necessary calculations. In this study, the flow of a gaseous coolant in the branches of pipelines of heat exchange devices is considered as subcritical and stationary. The actual stationary flow of a gaseous heat carrier in heat exchangers is not one-dimensional and is accompanied by losses of mechanical energy, so the calculations use a flow coefficient less than one, which takes into account the narrowing of the flow and the loss of mechanical energy. Depending on the ratio of pressures and cross-section areas, the flow coefficient can be determined from experimental static purges. The flow of the gaseous coolant in the branches of the pipelines of heat exchangers is accompanied by turbulence and the generation of separation zones, which causes significant losses of mechanical energy. Qualitative and quantitative estimates of losses, as well as the flow structure, in stationary flows in the branching pipelines of heat exchangers are most often established on the basis of an experiment. In this paper, we solve equations for an energy-isolated isentropic flow in which the thermodynamic parameters of a gaseous coolant are related in a certain way. The paper substantiates the choice of a theoretical model for mathematical modeling of the flow of a gaseous coolant in the branches of pipelines of heat exchangers with a permissible degree of approximation to the real flow and the complexity of the necessary calculations - a thermodynamic model of a subcritical stationary flow of a compressed gas. Analytical solutions to the problem of flow in the branches of fluxes of gaseous coolant in the pipelines of heat-exchange devices were obtained, whereas previously only numerical solutions to this problem took place [1-10].

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References

  1. Abramovich GN. Applied gas dynamics, Moscow: Nauka (1976): 888.
  2. Altshul AD. “Hydraulic resistances”. Moscow: Nedra (1982): 224.
  3. Idelchik IE. “Aerohydrodynamics of technological devices. (Supply, discharge, and flow distribution across the cross-section of the apparatus)”. Moscow: Mashinostroenie (1983): 351.
  4. Idelchik IE. Handbook of hydraulic resistances. Moscow: MA-bus-building (1975): 427.
  5. Idelchik IE. Handbook of hydraulic resistances/Under the editorship of M. O. Steinberg. M: Mashinostroenie (1992): 672.
  6. Kruglov MG and Mednov AA. “Gas dynamics of combined internal combustion engines”. Moscow: Mashinostroenie (1988): 360.
  7. loitsyansky LG. “Fluid and gas Mechanics”. Moscow: Nauka (1987): 840.
  8. Reference for calculation of hydraulic and ventilating systems. Edited by A. S. Yuriev. Saint Petersburg: ANO NGO "Mir and family” (2001):1154.
  9. Shevelev FA. “Tables for hydraulic calculation of steel, cast iron, asbestos-cement, plastic and glass water pipes”. Moscow: stroizdat (1973): 112.
  10. Dubinov AE., et al. “Lambert's W-function and its application in mathematical problems of physics”. Sarov: FSUE "RFNC-VNIIEF” (2006): 160.
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Citation

Citation: IE Lobanov. “Analytical Solution of the Problem of Stationary Subcritical Flow of a Gaseous Heat Carrier in the Branches of Pipelines of Heat Exchangers". Acta Scientific Computer Sciences 2.9 (2020): 29-30.




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Acceptance rate35%
Acceptance to publication20-30 days

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