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CFD Approach towards Urban Bus Passenger Comfort
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on September 22, 2021 by SAE International in United States
Passenger Comfort in long journeys is one of the major criteria to define the success of a bus manufacturer. The purpose is accomplished if the passenger spends less time overcoming the fatigue caused by the journey. In this paper the passenger comfort is analyzed based on Urban Bus Specifications (UBS) parameters using CFD tools. In general the comfortable temperature for human body in summer varies from 21-25°C based on individual choice. In extreme conditions the temperature touches 47°C in some parts of the country. The efficiency of Air conditioning then can be measured in terms temperature drop relative to ambience and how quickly it is achieved. The testing process is not only time consuming but it will be perform after the product is made hence any design change increases the process time. The virtual validation saves time for testing also there remains a scope for improvement in vent designs & AC capacity. This paper explains the methodology to follow for a bus air conditioner CFD analysis followed by testing procedure. CFD methodology involves setting up the solver with input boundary conditions of solar loads, passenger heat load, ambient conditions & grill profile. Enabling equations of conduction, convection & radiation. Final steps require validation of CFD results with test results. The simulation results were compared with the measured test data and good agreement was observed validating the developed simulation approach.