Enhancement of aerodynamic performance through high pressure relief in the engine room for passenger car using cfd technique

Ha, Sung Jun; Chun, Ung; Park, Jong Yun; Kim, Moon Sang

doi:10.1007/s12239-017-0077-6

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…They have concluded that 20° of rear slant angle has highest crosswind sensitivity while 0° has minimum sensitivity. Ha et al [2] have studied the air flow around small passenger car in order to improve aerodynamic performance. They have concluded that adding perforated holes on wheelhouse line can enhance drag coefficient and radiator mass flow rate by relieving the high pressure in engine compartment.…”

Section: Introductionmentioning

confidence: 99%

Optimal configuration of a hatchback rear end considering drag and stability objectives

Beigmoradi

Vahdati

2019

J Braz. Soc. Mech. Sci. Eng.

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Aerodynamic load is recognized as one of the most important factors, which has significant effect on fuel consumption, vehicle performance, and stability. Designing external car body to meet aerodynamic drag and stability requirements is one of the most challenging works in vehicle development process. In this paper, optimum design of rear-end parameters for a hatchback car is studied considering both drag and lift goals. Five geometrical parameters of rear end are chosen as design variables at two levels. Interaction of these factors on drag and lift coefficients is investigated using design of experiments, and optimum level for each parameter is achieved. To reduce the number of case studies, fractional factorial design algorithm is nominated. Then, drag and lift regression equations based on important terms are derived and the relationship of these parameters with objectives are discussed. Finally, aerodynamic performance around the optimal model is reported.

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Section: Introductionmentioning

confidence: 99%

Optimal configuration of a hatchback rear end considering drag and stability objectives

Beigmoradi

Vahdati

2019

J Braz. Soc. Mech. Sci. Eng.

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“…Consequently, the role of computational fluid dynamics (CFD) simulation in the engine development process is emerging because of its time and cost reduction features. 6,7…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the role of computational fluid dynamics (CFD) simulation in the engine development process is emerging because of its time and cost reduction features. 6,7 The laminar burning velocity (LBV) is an essential input parameter for predicting the combustion process of spark-ignition (SI) engines which is governed by the turbulent flame propagation. Either an empirical correlation or a numerical computation of LBV can be used for the engine simulation, however, both research on gasoline's LBV are relatively scarce compared to the pure hydrocarbon 8,9 because of the complex and variable composition of the fuel.…”

Section: Introductionmentioning

confidence: 99%

Modeling laminar burning velocity of gasoline using an energy fraction-based mixing rule approach

Kim

Min

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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To determine an optimum combustion chamber design and engine operating strategies, computational fluid dynamics simulations of direct-injection spark-ignition engines have become an indispensable step in the powertrain development process. The laminar burning velocity of gasoline is known as an essential input parameter for combustion simulations. In this study, a new methodology for modeling the laminar burning velocity of gasoline for direct-injection spark-ignition engine simulations is proposed. Considering the gasoline as a complex mixture of hydrocarbon fuel, three hydrocarbons, iso-octane, n-heptane, and toluene were incorporated as surrogate fuel components to represent gasoline with distinct aromatic laminar flame characteristics compared to alkane. A mixing rule, based on energy fractions, was adopted to consider the compositional variation of gasoline. The laminar burning velocities of iso-octane, n-heptane, and toluene were calculated under wide thermo-chemical conditions in conjunction with detailed chemical reaction kinetics in the premixed flame simulation. Finally, a set of laminar burning velocity model equations was derived by curve-fitting the flame simulation results of each hydrocarbon component in consideration of the effect of temperature, pressure, and diluent. The laminar burning velocity model was validated against the measurement data of gasoline’s laminar burning velocity found in the literature, and was applied to the computational fluid dynamics simulation of a direct-injection spark-ignition engine under the various operating conditions to explore the prediction capability.

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Simulation of Air Flow on the Bodywork Automobile with Direct and Side Load

Sutak

Hatala

Zajac

et al. 2019

Lecture Notes in Mechanical Engineering

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Enhancement of aerodynamic performance through high pressure relief in the engine room for passenger car using cfd technique

Cited by 9 publications

References 5 publications

Optimal configuration of a hatchback rear end considering drag and stability objectives

Optimal configuration of a hatchback rear end considering drag and stability objectives

Modeling laminar burning velocity of gasoline using an energy fraction-based mixing rule approach

Simulation of Air Flow on the Bodywork Automobile with Direct and Side Load

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