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Title: Optimizing the turbo-roto-compound (TRC) engine. Final report

Abstract

Results of multidimensional computations of sprays in a very high pressure constant volume chamber are presented in two parts. Comparisons of computed and measured penetrations of non-vaporizing and vaporizing sprays are presented. A broad range of density ratios (0.005 to 0.243) is covered. It is shown that, provided sufficient numerical resolution is used, the model can adequately reproduce the measurements. Scaling laws for time and distance derived in a previous publication are found to apply also to the sprays over the broad range of density ratios considered. A combustion sub-model that has been used in spark-ignition engines, stratified-charge engines and Diesel engines is included in the model. The combustion sub-model represents low-temperature autoignition and high temperature heat release. Comparisons of computed and measured penetrations of combusting sprays and computed and measured chamber pressures are being made. In this report, only preliminary indicative comparisons of computed and measured chamber pressures for three cases are presented. Agreement of pressures within 5% is shown. The work is ongoing and a detailed report will be presented later.

Authors:
 [1]
+ Show Author Affiliations
  1. Minnesota Univ., Minneapolis, MN (United States). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States); Minnesota Univ., Minneapolis, MN (United States). Dept. of Mechanical Engineering
Sponsoring Org.:
Department of Defense, Washington, DC (United States)
OSTI Identifier:
206549
Report Number(s):
LA-SUB-95-104
ON: DE96006859; TRN: AHC29607%%67
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 15 Aug 1994
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; DIESEL ENGINES; COMPUTERIZED SIMULATION; FUEL INJECTION SYSTEMS; PROGRESS REPORT; SPRAYS; EVAPORATION; COMBUSTION KINETICS; MATHEMATICAL MODELS; PRESSURIZATION

Citation Formats

Abraham, J. Optimizing the turbo-roto-compound (TRC) engine. Final report. United States: N. p., 1994. Web. doi:10.2172/206549.
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Abraham, J. Optimizing the turbo-roto-compound (TRC) engine. Final report. United States. doi:10.2172/206549.
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Abraham, J. 1994. "Optimizing the turbo-roto-compound (TRC) engine. Final report". United States. doi:10.2172/206549. https://www.osti.gov/servlets/purl/206549.
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@article{osti_206549,
title = {Optimizing the turbo-roto-compound (TRC) engine. Final report},
author = {Abraham, J.},
abstractNote = {Results of multidimensional computations of sprays in a very high pressure constant volume chamber are presented in two parts. Comparisons of computed and measured penetrations of non-vaporizing and vaporizing sprays are presented. A broad range of density ratios (0.005 to 0.243) is covered. It is shown that, provided sufficient numerical resolution is used, the model can adequately reproduce the measurements. Scaling laws for time and distance derived in a previous publication are found to apply also to the sprays over the broad range of density ratios considered. A combustion sub-model that has been used in spark-ignition engines, stratified-charge engines and Diesel engines is included in the model. The combustion sub-model represents low-temperature autoignition and high temperature heat release. Comparisons of computed and measured penetrations of combusting sprays and computed and measured chamber pressures are being made. In this report, only preliminary indicative comparisons of computed and measured chamber pressures for three cases are presented. Agreement of pressures within 5% is shown. The work is ongoing and a detailed report will be presented later.},
doi = {10.2172/206549},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1994,
month = 8
}
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Technical Report:
View Technical Report (1.63 MB)
DOI:  10.2172/206549
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