On the heat in the nozzle of the industrial pneumatic pulsator

Krzysztof J. Wołosz , Jacek Wernik

Abstract

An industrially applicable nozzle is the subject of this study. The nozzle is an auxiliary equipment of a pneumatic pulsator system for unclogging outlets of silos which store loose materials. The aim is to determine the amount of heat which is generated during one work cycle of the system. Investigation in this field has not been carried out so far, and the present-day designing process is significantly based on heuristic knowledge. The heat is calculated by using results of a numerical simulation. The Finite Volume Method has been used with a thermodynamically ideal gas model. The airflow is assumed to be transient, compressible and supersonic, and it is driven by a time-varying pressure difference. There is an estimation of discretization error of the numerical results carried out in order to confirm the reliability of the solution. The error estimation shows that the results lie in the vicinity of the exact solution of the governing equations. Instantaneous results of the simulation indicate a locally flow which intensifies flow parameters in a similar way as the convergingdiverging nozzles do. The value of the total heat generated during gas conversion within the nozzle is negative; thus, the nozzle could be cooled during its functioning.
Author Krzysztof J. Wołosz IIM
Krzysztof J. Wołosz,,
- Institute of Mechanical Engineering
, Jacek Wernik IIM
Jacek Wernik,,
- Institute of Mechanical Engineering
Journal seriesActa Mechanica, ISSN 0001-5970
Issue year2016
Vol227
No4
Pages1111-1122
Publication size in sheets0.55
DOIDOI:10.1007/s00707-015-1502-4
URL http://link.springer.com/article/10.1007/s00707-015-1502-4
Languageen angielski
File
10.1007_s00707-015-1502-4.pdf / 2.06 MB / 10.1007_s00707-015-1502-4.pdf 2.06 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.851 (2) - 2016=1.769 (5)
Citation count*3 (2018-02-20)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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