Flow characteristics in a cabin during door closure

Lee, Y L; Hwang, Sung-Wook

doi:10.1177/09544070jauto1325

Cited by 6 publications

(1 citation statement)

References 7 publications

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“…With the improvement of automobile manufacturing technology, the air tightness of the whole vehicle has reached an excellent level, but the tingling of the eardrums of the drivers and passengers during the closing process has become the focus of customer complaints. Researchers [1][2][3][4][5][6] studied the improvement scheme of eardrum pressure by analyzing the influence of single factors on the pressure in the vehicle. However, as a complex system engineering, automobile performance development should comprehensively analyze the change law of the dynamic characteristics of the flow field in the cabin from the perspective of the joint action of multiple factors; Secondly, researchers usually judge the degree of influence of factors based on engineering experience.…”

Section: Introductionmentioning

confidence: 99%

Study on empirical model and CFD about pressure rising in Cab during door closure

Song¹,

Pan²,

Qiu³

et al. 2022

Vib. proced.

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Aiming at the problem that there is a strong eardrum pressure in the passenger car during the closing process, two analysis and prediction methods, fast formula prediction and CFD simulation based on accurate models, are proposed. The regression model of ear pressure comfort was established by DOE method and multiple linear regression; The simulation software star-CCM+ is applied to simulate and analyze the dynamic characteristics of the flow field in the cockpit during the closing process by using the overlapping grid technology, and the pressure change curve near the ear is obtained. Finally, the CFD numerical simulation model is established by comparing and analyzing the regression prediction analysis results and the real vehicle test data. The results show that the effects of closing speed, effective opening area of pressure relief valve and air tightness of the whole vehicle on the pressure of passengers’ eardrums decrease in turn, and the prediction error of multiple linear regression equation is 17 %; The analysis error of the internal flow field dynamic characteristic model based on refined modeling is 8 %. This study provides a theoretical basis for solving the problem of rapid prediction of eardrum pressure and optimization of engineering structure.

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Section: Introductionmentioning

confidence: 99%

Study on empirical model and CFD about pressure rising in Cab during door closure

Song¹,

Pan²,

Qiu³

et al. 2022

Vib. proced.

View full text Add to dashboard Cite

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Aerodynamic behavior during closing of sliding door based on fluid–solid coupled simulation

Chen,

Qiu,

Xue

et al. 2024

Physics of Fluids

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The air pressure resistance experienced by an automotive door during its closing process significantly affects user experience. However, owing to the motion complexity of sliding doors, their aerodynamic behavior during closing has not been investigated. In this study, a fluid–solid coupled simulation approach is proposed, in which data exchange between multibody dynamics simulation and computational fluid dynamics simulation is achieved via the functional mockup interface protocol. Actual vehicle tests are conducted to validate the coupled simulation approach, and the results show an average error of 5.2% for the maximum air pressure in the cabin during door-closing. Investigations into the aerodynamic behavior show that the air pressure distribution inside the cabin remains highly uniform throughout the door-closing process and that a significant correlation exists between the air pressure variation and sliding door motion. The effects of the motion mechanism parameters of the sliding door on air pressure are analyzed. A positive correlation is indicated between the air pressure and middle rail radius. When the radius increases from 60 to 120 mm, the maximum air pressure increases by 13.6%. Positive correlations are indicated between the air pressure and the offsets of the hinge of the middle arm along the x- and y-directions. When the hinge's offset is changed from −10 to 10 mm along the x- and y-directions, the maximum air pressure increases by 5.5% and 8.9%, respectively.

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Numerical analysis of the influence of air flow channel on ear pressure during door closure

Ren,

Zhang,

Tang

et al. 2024

Vib. proced.

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In this paper, Numerical simulation analysis was conducted on the ear pressure of a certain vehicle model during door closing process. Firstly, relevant airflow channel parameters are formulated based on the benchmark vehicle data, and transient closing ear pressure simulation calculation is carried out using overset grid technology. Then, the impact of key structural parameters on the interior ear pressure of the car was analyzed. Finally, based on the requirements of actual engineering design, the design scheme for the peak pressure of the car was determined, and the results will be a reference for the development and design of later vehicle.

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Flow characteristics in a cabin during door closure

Cited by 6 publications

References 7 publications

Study on empirical model and CFD about pressure rising in Cab during door closure

Study on empirical model and CFD about pressure rising in Cab during door closure

Aerodynamic behavior during closing of sliding door based on fluid–solid coupled simulation

Numerical analysis of the influence of air flow channel on ear pressure during door closure

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