3-D numerical and experimental analysis for airflow within a passenger compartment

C. H. Chien, Jiin-Yuh Jang, Y. H. Chen, S. C. Wu

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

People use cars so frequently that they always consider the air-conditioning, and thermal comfort of the driver and passenger when buying a new car. Therefore accurate simulation of the thermal performance of automobile air conditioners to improve human comfort has become increasingly important. In order to improve the thermal comfort of passengers, 3-D flow motion and thermal behavior within vehicles must be analyzed. In this paper, a numerical simulation was used to investigate thermal behavior in a vehicle. Because air temperature at an air vent is related to the cooling capacity of the air conditioner, the cooling capacity was calculated using ε-NTU (effective number of transfer unit) theoretical equations. Using the air temperature relationship between inlet and outlet vents as boundary conditions, a 3-D unsteady κ-ε turbulent model was used to give a transient analysis simulation of the temperature field and flow conditions in a vehicle's passenger cabin. Cooling cycle analysis and conjugate heat transfer analysis at the inside surface of the cabin's ceiling, floor and sides were also considered. The predicted temperature distributions in the vehicles passenger cabin were in good agreement with those obtained experimentally.

Original languageEnglish
Pages (from-to)437-445
Number of pages9
JournalInternational Journal of Automotive Technology
Volume9
Issue number4
DOIs
Publication statusPublished - 2008 Aug 1

Fingerprint

Air
Thermal comfort
Vents
Cooling
Temperature distribution
Railroad cars
Ceilings
Air conditioning
Transient analysis
Automobiles
Boundary conditions
Heat transfer
Temperature
Computer simulation
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Automotive Engineering

Cite this

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abstract = "People use cars so frequently that they always consider the air-conditioning, and thermal comfort of the driver and passenger when buying a new car. Therefore accurate simulation of the thermal performance of automobile air conditioners to improve human comfort has become increasingly important. In order to improve the thermal comfort of passengers, 3-D flow motion and thermal behavior within vehicles must be analyzed. In this paper, a numerical simulation was used to investigate thermal behavior in a vehicle. Because air temperature at an air vent is related to the cooling capacity of the air conditioner, the cooling capacity was calculated using ε-NTU (effective number of transfer unit) theoretical equations. Using the air temperature relationship between inlet and outlet vents as boundary conditions, a 3-D unsteady κ-ε turbulent model was used to give a transient analysis simulation of the temperature field and flow conditions in a vehicle's passenger cabin. Cooling cycle analysis and conjugate heat transfer analysis at the inside surface of the cabin's ceiling, floor and sides were also considered. The predicted temperature distributions in the vehicles passenger cabin were in good agreement with those obtained experimentally.",
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3-D numerical and experimental analysis for airflow within a passenger compartment. / Chien, C. H.; Jang, Jiin-Yuh; Chen, Y. H.; Wu, S. C.

In: International Journal of Automotive Technology, Vol. 9, No. 4, 01.08.2008, p. 437-445.

Research output: Contribution to journalArticle

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