AIR FLOW CHARACTERISTICS FOR THE GEOMETRY MODIFICATION OF BELLOWS PIPE ON INTAKE SYSTEM OF AUTOMOBILE

Bellows is a component used to reduce the joint or vibration in various pipes. It is used in intake or exhaust pipes for cars and usually used to solve the vibration problem caused by components such as an engine. Until now, the structural analysis was normally more emphasized, so research had made progress mainly on structural analysis. However, for intake pipes, geometric form of bellows could influence the performance of the engine, thus requiring research. Therefore, in this paper, we investigated the flow characteristics such as pressure loss and velocity change of each shape after various modeling by varying the geometric shape of the bellows with the width or pitch of the bellows. Based on these results, we investigated the factors influencing the flow change and the changes by the factors. As a result of observing the effect after adding change to the width and number of the bellows among the design factor of bellows, pressure loss had shown the most significant change with 162Pa when the number of the bellows was changed.