CFD analysis of the flow in an automotive headlamp

Okada, Yoji

doi:10.1016/s0389-4304(01)00172-2

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…Based on the research study of the Micro Electric Vehicle design, there are several research that used CFD in performing analysis such as battery efficiency [4], headlamp condensation [5], radial fan for motor cooling [6] and many more [4]- [10]. Computational Fluid Dynamics (CFD) is an advanced type of aerodynamic analysis software that usually used to understand the relation of several parameters in case study.…”

Section: Computer Fluid Dynamicmentioning

confidence: 99%

Shape Optimization with Computer Fluid Dynamic (CFD) Analysis of Micro Electric Vehicle

Razak*,

Shafee,

Shamsuddin

et al. 2019

IJRTE

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Car drag reduction activities are parts of exterior body improvement which related to energy consumption, wind noise and stability of overall vehicle. Micro Electric Vehicle (MEV) has emerged as one of human mobility that aligned with the concept of low energy consumption. The concept has gained popularity due to its simplicity in design and manufacturing capability which in overall, leads to less energy consumption for both vehicle owner and manufacturer. The aim of this work is to design an MEV where the passenger’s anthropometry of 95th percentile male and 5th percentile female have been considered as a main factor. 3D data of MEV has been developed based on scaled down conceptual design from clay model. Computer Fluid Dynamic (CFD) analysis were used on actual size of MEV to determine the effect of the vehicle height. Maximum speed of 30m/s has been introduced in the analysis. The speed is a simulation from real world condition of mobility which will be the limit speed of the vehicle. As a result the 128mm increase in streamline height has significant impact on the drag force where the drag coefficient increase approximately 31% to the initial height. As a conclusion CFD approach can be used to successfully determine an optimal height of MEV based on streamline design. The finding significantly assist in future improvement of streamline design of the MEV.

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Section: Computer Fluid Dynamicmentioning

confidence: 99%

Shape Optimization with Computer Fluid Dynamic (CFD) Analysis of Micro Electric Vehicle

Razak*,

Shafee,

Shamsuddin

et al. 2019

IJRTE

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“…They developed a numerical calculation method on this subject and then applied it to the condensation analysis in the headlight [9]. Oxyzoglou (2018), Herridge (2003) and Okada et al (2001) conducted studies on condensation analysis in vehicle lighting systems.…”

Section: Introductionmentioning

confidence: 99%

Araç Aydınlatma Sisteminde Yoğuşma Bölgesi Tahmini ve Yoğuşmanın Sayısal Analiz ile Belirlenmesi ve Karşılaştırılması

SÖKMEN

KOCABIYIK²,

MEŞECİ³

et al. 2022

EJOSAT

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The condensation problem in automobile lighting system risks driving and driver safety. Condensation is the main cause of problems such insufficient lighting. In our study, the problem of condensation in vehicle headlights is discussed. The region where condensation will occur was estimated from the results obtained from the temperature analysis. The amount of condensed mass was calculated by the calculation method. Calculations were confirmed by numerical analysis. In the analyzes made in ANSYS 2022 R2 software, the transmission effects (conjugate effects) in the headlight components were taken into account. Boussinesq approach was used for natural convection and Monte Carlo approach was used for considering radiation effects. Mesh independence was was studied. Thermal analyzes were made at ambient temperature T∞=5 °C and RH: 95% independent of time. As a result of the analysis, the indoor air temperature distribution, air flow profiles were examined and an estimate was made where the condensation would occur. Then, the thermal analysis results were read as the initial condition, and it was kept for 300 seconds. Water at 3 °C was sprayed onto the lens. Condensation formation analyzes were made in terms of time. After the formation of condensation, the power was turned on to the lighting elements and it was expected that the condensation would be removed within 1800 seconds as per the specification. The region where condensation is predicted and the region with condensation in the analyzes are compatible with the literature.

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“…In addition, the surrounding parts are deformed by thermal shocks at higher temperatures. Among the automotive lamp modules, the part subjected to the highest heat is the reflector that reflects the light of the bulb outside [2]. To minimize the deformation of the reflector caused by thermal shocks, many studies have been actively conducted worldwide on heat dissipation design and material change for heat release [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on the Application of Polymer Matrix Composites Containing Al2O3 for Automotive Lamp Reflector

Kim

et al. 2019

Applied Sciences

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As automotive lamps are highly integrated, the heat generated from bulbs reduces the light quantity and lifespan of the bulbs. Numerous studies have been actively conducted worldwide on heat dissipation designs and material modifications for heat release. In this study, an analysis was carried out of the mechanical, thermal, and morphological characteristics of Polybutylene Terephthalate (PBT) and Polyamide (PA6) matrix composites containing alumina filler; further, their flowability and injection moldability were also studied. The PA6 matrix that was subjected to an addition of 60% alumina was selected as the sample. To compare the performances of the selected composites with that of the fog lamp reflector manufactured with conventional PBT, fog lamp reflectors were fabricated. When 60% alumina was added, the thermal conductivity was improved. Thus, the maximum temperature of the lamp reflector was reduced, and the heat was transferred to the surroundings; this was in contrast to the fog lamp reflector fabricated with conventional PBT.

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CFD analysis of the flow in an automotive headlamp

Cited by 15 publications

References 3 publications

Shape Optimization with Computer Fluid Dynamic (CFD) Analysis of Micro Electric Vehicle

Shape Optimization with Computer Fluid Dynamic (CFD) Analysis of Micro Electric Vehicle

Araç Aydınlatma Sisteminde Yoğuşma Bölgesi Tahmini ve Yoğuşmanın Sayısal Analiz ile Belirlenmesi ve Karşılaştırılması

Experimental Analysis on the Application of Polymer Matrix Composites Containing Al2O3 for Automotive Lamp Reflector

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