CFD Analysis of Drag Reduction for a Generic SUV

Krishnani, Pramod Nari; Zhou, Dongmei

doi:10.1115/imece2009-10170

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…Pramod Nari Krishnani et al [1] discovered that the flow in the rear wake of the blunt bodies of road vehicles like SUVs plays an important role in determining the pressure forces acting on the surface of the body. This study involved performing numerical analysis on CAD model of a Generic SUV which was previously tested in the wind tunnel.…”

Section: Scientific (Ijtsrd)mentioning

confidence: 99%

Methods of Improving Aerodynamics of a Vehicle- A Review

Rana¹

2018

IJTSRD

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In this work, a detailed study has been done to investigate flow of air over the vehicle and methods have been discussed to check the effectiveness in particular cases, methods like vortex generators, guided vanes, tail plates, rear spoilers, angled diffusers, rear under body slicing ,splitter plates and exhaust gas redirection have been reviewed. The main aim of the review study was to know the factors affecting Coefficient of drag and lift. Of all mentioned techniques and methods, vortex generator and tail plates were found more effective in reducing the drag coefficient as well as the li coefficient. The study proposed that CFD methods application is proving to be an effective method of improving aerodynamics of a vehicle.

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Section: Scientific (Ijtsrd)mentioning

confidence: 99%

Methods of Improving Aerodynamics of a Vehicle- A Review

Rana¹

2018

IJTSRD

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“…So it is very binding on the designers to focus on decreasing this drag by implementing design changes at the rear and also by the addition of the passive control devices. Krishnani [2] had described the fuel usage of cars in both urban and highway driving. The vehicle shape uses about 3% of fuel to overcome the resistance it offers in urban driving whereas it takes 11% of fuel in case of highway driving.…”

Section: Fig-1mentioning

confidence: 99%

CFD Analysis of Car Body Aerodynamics Including Effect of Passive Flow Devices – A Review

Ahmed¹

2016

IJRET

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With the emphasis lying on increasing fuel efficiency of vehicles in order to combat rising fuel prices and environmental challenges the manufacturers are thinking beyond the conventional vehicle systems by focusing on its aerodynamics. Aerodynamic drag exceeds 50 per cent of the total resistance to motion at speeds above 70km/hr, and above 100 km/hr it is the most important factor. The review is done to identify the various shortcomings of the automotive designers when it is in regards to flow separation of air at the rear of the vehicle which causes most of the losses. This paper focuses on the work already done in the field of aerodynamics starting with Ahmed Body. It is a bluff body with adjustable rear slant angle and the basis upon which the aerodynamicists test their models. And then, moving onto passive aerodynamic enhancements for automobiles like vortex generators and diffusers whose various dimensional modulations were discussed with several steps leading to its advancement in vehicle body design. This brings to the simulation, Computational Fluid Dynamics (CFD) and its role in this analysis was covered. CFD has been modified a lot from the beginning to increase the accuracy of its predictions. So the paper lists various simulation techniques studied by the previous researchers in order to understand the wake region behind the car which has been notoriously difficult to predict till date. Several aspects of aerodynamic drag that need further analysis to improve the aerodynamic were highlighted.

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“…The long term increasing fuel prices and energy consumption has been a global issue. Fuel consumption due to aerodynamic drag of a road vehicle consumed more than half of the vehicle's energy at highway velocity (Krishnani (2009)).…”

Section: Introductionmentioning

confidence: 99%

Bluff Body Drag Control using Synthetic Jet

Gil¹,

Aeronautics²

2019

JAFM

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The paper presents the results of an experimental investigation wherein the bullet form drag force as a function of oscillating actuator frequency, various voltage and for different orifice/slot configuration are studied. In order to perform the experiment, an axisymmetric bullet shape model with ellipsoidal nose was used in wind tunnel. The synthetic jet actuator was used to flow control at sharp cut end. The experiment was conducted in a wind tunnel with a working diameter of 1000 mm and a maximum velocity of 45 m/s. The measurements were carried out for the Reynolds number from 88000 to 352000 and for relatively large Strouhal numbers up to St = 4.5 based on model external diameter and free stream velocity. While synthetic jet was switched on, drag coefficient has been reduced by-6% and increased by +22% in relation to the case with the synthetic jet was switched off. The synthetic jet has more impact for relatively low free stream velocity and for single axisymmetric orifice.

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CFD Analysis of Drag Reduction for a Generic SUV

Cited by 17 publications

References 2 publications

Methods of Improving Aerodynamics of a Vehicle- A Review

Methods of Improving Aerodynamics of a Vehicle- A Review

CFD Analysis of Car Body Aerodynamics Including Effect of Passive Flow Devices – A Review

Bluff Body Drag Control using Synthetic Jet

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