Analysis of the influence of aerodynamic drag of body elements on fuel consumption.
Students Name: Danch Oleksandr Oleksandrovych
Qualification Level: magister
Speciality: Motor Vehicle Transport
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Danch A. A. Porokhovskyi Yu. V. (supervisor). Analysis of the influence of aerodynamic drag of body elements on fuel consumption. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2020. When driving a car, three groups of forces act on it: driving; normal to the road surface; motor resistance forces. The driving force is the traction force on the drive wheels. Normal forces - weight and normal road reactions. Motor resistance - the forces that the car must overcome while driving. The forces of motor resistance include: rolling resistance force, lifting resistance force, air resistance force, inertia force (acceleration resistance force). The force of air resistance is formed by friction of air layers on the surface of the car, by compressing the air by a moving vehicle; low pressure zone behind the car; vortices of air layers behind the vehicle. As the speed of the car increases, the force of air resistance increases in a square order, in order for the car to develop maximum speed requires not only high engine power, but also good aerodynamic performance [1]. An analysis of existing methods for studying the aerodynamic properties of vehicles, namely: checking the flow of the car in the wind tunnel of various enterprises and research laboratories, visualization of air flows around the car with smoke and scalable models. To consider the research methods, their advantages and disadvantages during the experimental determinations of vehicle aerodynamics are described [2, 3]. Since commercial vehicles, when transporting goods, pollute the greatest environment, the second part considers how the shape of the body and methods of securing the load affect the aerodynamic drag of the car. The design features of the cabin elements and additional overlays on the body, in terms of their impact on the flow of the vehicle and the prospects for their development are considered in more detail [4]. The third part of the work describes the technical characteristics of the object of study and in the environment of Solid works developed a simulation model of a car with a semi-trailer. Based on the developed model, changes were made to the elements of the car body and their influence on the flow coefficient of the vehicle was determined. Having obtained the value of air resistance, it was determined by how much the fuel consumption will change and the environmental performance of the vehicle during transport work will improve accordingly. The purpose and objectives of the study. The purpose of the qualification work is to determine the impact of aerodynamic drag of body elements on fuel consumption and environmental performance of the vehicle. The object of the study is a commercial vehicle, which consists of a body and a closed body. The subject of research - the geometric parameters of the elements of the body and cab. Research methods. In the master’s qualification work to achieve this goal used theoretical research with modeling in the environment of Solid works. Key words: aerodynamics, Solid works, air flows, streamlining. 1. Є. Г. Опанасюк, Д. Б. Бегерський, М. М. Можаровський, О. Є. Опанасюк. Дослідження аеродинамічних показників автопоїзда методом фізичного моделювання. Вісник ЖДТУ. Серія «Технічні науки». 2019. № 1 (83). С. 25-34 2. https://www.dailytechinfo.org/auto/2754-mashiny-monstry-samaya-bolshaya-v-mire-aerodinamicheskaya-truba-dlya-ispytaniy-avtomobiley.html 3. Andrew R. Coggan, Ph.D. “The Coggan Low Speed Wind Tunnel: Design, Dimensions, and Operating Characteristics” Coggan LSWT-November 2011. 4. Kalpesh Vaghela “Optimization of Roof fairing angle to reduce the Aerodynamic Drag of Heavy Duty Truck” (IJETCAS) ISSN (Print): 2279-0047 ISSN (Online): 2279-0055.