Faculty Publications
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Item Numerical Investigation of Gasper Air Jet Dynamics in an Aircraft Cabin(Taylor and Francis Ltd., 2023) Srinivasa, V.K.; Kattimani, S.; Reddy C, G.Computational fluid dynamics (CFD) is used to analyze the jet interaction of side-vent and gaspers and their influence on cough jets in aircraft cabins. A control device is designed and proposed to be attached to the existing gasper outlet to widen narrow, high-velocity air jet into a widespread air curtain. It forms a shield around the passenger's face, controlling cough droplets from infected passengers entering the co-passengers breathing zone and pushing the high-velocity cough jet toward the floor. A detailed study on flow distribution with existing gaspers and the newly designed control device is presented. The influence and efficacy of the control device in achieving desired flow spread, droplet spread, and intrusion control into co-passengers breathing zones are evaluated. The simulation showed significant droplets were reaching window and aisle passenger breathing zones in the existing gasper, whereas no droplet was found when the control device was introduced. © 2024 Informa UK Limited, trading as Taylor & Francis Group.Item A CFD-Based Design of S-Shaped Nozzle Attachment for Aircraft Cabin Gaspers(Taylor and Francis Ltd., 2023) Srinivasa, V.K.; Kattimani, S.; Ganga Reddy, C.; Kavya, S.Cough has been the primary mode for transmitting airborne respiratory diseases as the droplets expelled are suspended in the air longer in closed environments like aircraft cabins. Air jets from personal gasper nozzles are studied using computational fluid dynamics (CFD) simulations to understand the flow pattern, which is of high velocity, very narrow, and susceptible to enhanced air mixing. An S-shaped nozzle attachment uses higher-order Bezier curves to spread the flow across the passenger’s face to form a shield to protect the breathing zone from foreign particles. The design of experiments theory, the Box–Behnken design, was employed to understand the influence of nozzle profile geometric parameters on the output criteria through CFD simulations. The numerical simulations were performed on the final design, which shows that the newly designed nozzle attachment can distribute the narrow jet from existing personal gasper nozzles into a curved air curtain across the passenger’s face. © 2024 Informa UK Limited, trading as Taylor & Francis Group.