AIR VELOCITY and PRESSURE DROP EXPLORATION INSIDE PIPE FRAME of AIR PURIFIER BICYCLE USING NUMERICAL ANALYSIS

The function of air purifier bicycle (APB) besides short distance transportation, exercise moreover as an air filter. The air environment in the city has worsened with the increasing amount of motor vehicles, also growing the number of factories that produce air pollution. It is expected that the APB will be able to improve the quality of dirty air to clean the area The shape, direction, number of curves, and the size of the pipe will significantly affect the quality of airflow through the APB frame. The more curves will certainly cause high head loss.. For this reason, it is necessary to measure air velocity and pressure drop in the APB. The analysis aims to find out whether the design frame is following the wishes or can still be further developed. The variable pipe diameter and incoming air velocity will be implemented using numerical simulations. It used Fluent Computational Fluid Dynamics (CFD) software. The air purifier bike simulation is carried out by varying the frame design, inlet speed, and pipe diameter used for the frame. Twenty-five designs have been proposed; two best frame designs that meet the static load test criteria were selected. From the two structures, a CFD simulation was performed by varying the inlet velocity and the diameter of the pipe frame. Differences in the diameter of the pipe frames used are five variations. The intake air velocity used is five variants. Simulations were carried out with Ansys Fluent software using Reynold Averaged Navier Stokes (RANS) and k-epsilon (k-ε) as the standard turbulence model. This option is commonly used for free shear layers. The simulation results show velocity, air pressure, and pressure drop on the frame. The more fluid is sucked and filtered in the APB head cup, the cleaner air that will be produced by APB.. Rear frame design enhancements in terms of pressure drop can reach 35.89% on average for various pipe diameters with more non-fluctuating air velocity inside the tube. For the front frame, an important decision was obtained by not using the bicycle fork anymore due to the pressure drop being too sharp.