From the previous study, it was found that total aerodynamic drag on a running vehicle is comprised of around 70% in pressure drag by stagnation on the front-side of the vehicle and 30% in induced drag by vortex at the rear-side of it. With this conventional body configuration of the bus, it is not easy to have an optimum shape of the bus with the minimum aerodynamic drag.
However, the external body shape of a long-distance, high-speed coach manufactured around the world is in a rectangular shaped blunt body. Numerous aerodynamic designs of high-speed coaches have been made to reduce aerodynamic drag for lower fuel consumption and to keep the driving stability of the vehicle on a highway.
From the analysis, it can be seen that each modification had a significant role in improving the aerodynamic performance of Road-Tanker. Effect of these modifications with respect to the base model is studied in detail and found out that, two types of models with 2% and 5% of width as fillet radius of the cabin, kingpin cavity closed, case 10 and case 15 modifications will improve the aerodynamic performance significantly. Further CFD analysis is carried out on a total of 15 different cases by considering the modifications individually and also combined together. Various improvements include modification of the cabin part by filleting the edges with a radius as a function of width of the cabin to reduce frontal drag, modification of the gap between cabin and tank to reduce rear drag on the vehicle, tank modifications are incorporated. The aerodynamic performance of the Road-Tanker was improved using various techniques, which reduces the drag force acting on the vehicle. Base model for Road-Tanker is prepared according to IS 13187:1991 specifications. Aerodynamic analysis of a Road-Tanker is carried out in the present work using CFD technique using ANSYS CFX ® software. PO Box, Afghanistan, Africa, American Samoa, Anguilla, Asia, Bahamas, Barbados, Belarus, Bermuda, Bolivia, Botswana, Cayman Islands, Central African Republic, Central America and Caribbean, Chad, Comoros, Cook Islands, Cuba, Republic of, Côte d'Ivoire (Ivory Coast), Djibouti, Ecuador, El Salvador, Europe, Falkland Islands (Islas Malvinas), Fiji, French Polynesia, Gambia, Guam, Guernsey, Guinea-Bissau, Guyana, Honduras, Jamaica, Jersey, Kiribati, Korea, North, Libya, Macedonia, Madagascar, Malawi, Maldives, Marshall Islands, Mayotte, Micronesia, Middle East, Moldova, Mongolia, Morocco, Nauru, Nepal, New Caledonia, New Zealand, Nicaragua, Niue, North America, Northern Territory, Palau, Papua New Guinea, Paraguay, Perth Metro, QLD Far North, Reunion, Russian Federation, Rwanda, SA Regional, Saint Pierre and Miquelon, San Marino, Senegal, Sierra Leone, Solomon Islands, Somalia, South America, Southeast Asia, Sudan, Suriname, Svalbard and Jan Mayen, Swaziland, Syria, Tasmania, Tonga, Trinidad and Tobago, Tunisia, Tuvalu, Uruguay, Vanuatu, Venezuela, Virgin Islands (U.S.Studying the aerodynamics of an automobile is essential, since the fuel efficiency the automobile is greatly affected by its aerodynamic shape.
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