The frequency of the orbital and the sub-orbital rocket launching are increasing worldwide and the need of negating the noise pollution is highly inevitable for humankind. The literature review reveals that the ma ority of the engine noise is due to the et noise coming out from the exhaust nozzle, this is particularly true during the liftoff as the exhaust et impinges on the launch pad and amplify the sound level leading to human discomfort. Therefore, design optimization of a launch pad is a meaningful ob ective for negating the liftoff et noise of rockets. In this paper, comprehensive numerical studies have been carried out for the geometry optimization of a mobile rocket launch pad using a validated steady 2D density based, SST k-ω turbulence model coupled with broadband noise source model. In the numerical study, a fully implicit finite volume scheme of the compressible, Navier-Stokes equations is employed. We have selected six different launch pad configurations for the parametric analytical studies. Among these, a launch pad facilitated with hemispherical shaped configuration shows relatively low noise level at both the horizontal and the vertical reference plane. We concluded that a mobile launch pad with a pragmatic mobile tunnel with hemispherical shaped inlet for the initial impingement of the rocket exhaust et along with the water in ection to the et will be a possible option for the future launch pad designs for the orbital and the sub-orbital rocket launching stations for negating the noise pollution for humankind.
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