The Formula Student rulebook specifies that a 20 mm circular restrictor is to be placed in the intake manifold. Conventionally, a straight profile converging–diverging nozzle, i.e. venturi, is used in place of a restrictor. The authors propose an alternative design, i.e. a curved profile converging–diverging nozzle, whose design has been adapted from that of a bell nozzle used in rocket engines. Firstly, the effect of change of various parameters on the pressure drop across the nozzle using CFD simulations is studied. It was found that a bell-shaped nozzle provided 32.4% decrease in pressure drop as opposed to straight profile nozzle. Thereafter, to analyse the effect of change of nozzle geometries on the engine’s performance, Ricardo WAVE 1-D simulations were done. WaveMesher was used to model the bell nozzle geometries in the WAVE model. It was found that a bell nozzle provided a maximum of 2.6% increase in brake power and 2.6% increase in torque at 7000 RPM as opposed to the straight profile nozzle. The ultimate motive behind the whole exercise was to improve the lap times of our car on-track in the competition. In order to get an idea about the increase or decrease in the lap times of the vehicle, point mass lap time simulation tool—Optimum Lap—was used. The car was simulated for the competition’s Autocross lap due to variety of fast and slow corners with long straights.
Nozzle Design for Intake Manifold for KTM 500 EXC Engine
Lect.Notes Mechanical Engineering
International Conference on Recent Advancements in Mechanical Engineering ; 2020 July 08, 2020 - July 09, 2020
2021-05-26
13 pages
Article/Chapter (Book)
Electronic Resource
English
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