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Title: Investigation on Underhood Thermal Analysis of Truck Platooning

Abstract

This paper presents a combined aero-thermal computational fluid dynamic (CFD) evaluation of platooning medium duty commercial vehicles in two highway configurations. Thermal analysis comparison is made between an approach that includes vehicle drag reduction on engine heat rejection and one that does not by assuming a constant heat rejection based on open road conditions. The paper concludes that accounting for aerodynamic drag reduction on engine heat load provides a more real world evaluation than assuming a constant heat load based on open road conditions. A 3D CFD underhood thermal simulations are performed in two different vehicle platooning configurations; (i) single-lane and (ii) two-lane traffic conditions. The vehicle platooning consists of two identical vehicles, i.e. leading and trailing vehicle. In this work, heat exchangers are modeled by two different heat rejection rate models. In the first model, a constant heat rejection rates are considered as similar to no-traffic vehicle condition. In the other model, a varied heat rejection rates are implemented by considering an aerodynamic influence on fuel consumption rates. In a constant heat rejection rate model, the trailing vehicle thermal performance is significantly dropped in single-lane traffic due to reduced oncoming cold mass air flow velocities from leading vehicle. Also,more » the similar observations are found in two-lane traffic but at higher vehicle separation distances. In a varied heat rejection rate model, significant drop in temperature raise is observed in both leading and trailing vehicles when compared to a constant heat rejection rate model in the single-lane and the two-lane traffic conditions. In leading and trailing vehicles, the varied heat rejection rates are obtained from fuel consumption rates.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1462718
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
SAE International Journal of Commercial Vehicles
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 1946-3928
Country of Publication:
United States
Language:
English
Subject:
Platooning, underhood thermal analysis

Citation Formats

Vegendla, Surya Narayana Prasa, Sofu, Tanju, Saha, Rohit, Hwang, Long-Kung, and Madurai Kumar, Mahesh. Investigation on Underhood Thermal Analysis of Truck Platooning. United States: N. p., 2018. Web. doi:10.4271/02-11-01-0001.
Vegendla, Surya Narayana Prasa, Sofu, Tanju, Saha, Rohit, Hwang, Long-Kung, & Madurai Kumar, Mahesh. Investigation on Underhood Thermal Analysis of Truck Platooning. United States. doi:10.4271/02-11-01-0001.
Vegendla, Surya Narayana Prasa, Sofu, Tanju, Saha, Rohit, Hwang, Long-Kung, and Madurai Kumar, Mahesh. Fri . "Investigation on Underhood Thermal Analysis of Truck Platooning". United States. doi:10.4271/02-11-01-0001.
@article{osti_1462718,
title = {Investigation on Underhood Thermal Analysis of Truck Platooning},
author = {Vegendla, Surya Narayana Prasa and Sofu, Tanju and Saha, Rohit and Hwang, Long-Kung and Madurai Kumar, Mahesh},
abstractNote = {This paper presents a combined aero-thermal computational fluid dynamic (CFD) evaluation of platooning medium duty commercial vehicles in two highway configurations. Thermal analysis comparison is made between an approach that includes vehicle drag reduction on engine heat rejection and one that does not by assuming a constant heat rejection based on open road conditions. The paper concludes that accounting for aerodynamic drag reduction on engine heat load provides a more real world evaluation than assuming a constant heat load based on open road conditions. A 3D CFD underhood thermal simulations are performed in two different vehicle platooning configurations; (i) single-lane and (ii) two-lane traffic conditions. The vehicle platooning consists of two identical vehicles, i.e. leading and trailing vehicle. In this work, heat exchangers are modeled by two different heat rejection rate models. In the first model, a constant heat rejection rates are considered as similar to no-traffic vehicle condition. In the other model, a varied heat rejection rates are implemented by considering an aerodynamic influence on fuel consumption rates. In a constant heat rejection rate model, the trailing vehicle thermal performance is significantly dropped in single-lane traffic due to reduced oncoming cold mass air flow velocities from leading vehicle. Also, the similar observations are found in two-lane traffic but at higher vehicle separation distances. In a varied heat rejection rate model, significant drop in temperature raise is observed in both leading and trailing vehicles when compared to a constant heat rejection rate model in the single-lane and the two-lane traffic conditions. In leading and trailing vehicles, the varied heat rejection rates are obtained from fuel consumption rates.},
doi = {10.4271/02-11-01-0001},
journal = {SAE International Journal of Commercial Vehicles},
issn = {1946-3928},
number = 1,
volume = 11,
place = {United States},
year = {2018},
month = {3}
}