Effects of Convective Heating on Movement and Vertical Coupling of Tropical Cyclones: A Numerical Study*

In hypersonic flight, the prediction of aerodynamic heating and the construction of a proper thermal protection system (TPS) are significantly important. In this study, the method of a film cooling technique, which is already the state of the art in cooling of gas turbine engines, is proposed for a fully reusable and active TPS. Effectiveness of the film cooling scheme to reduce convective heating rates for a blunt-nosed spacecraft flying at Mach number 6.56 and 40 deg angle of attack is investigated numerically. The inflow boundary conditions used the standard values at an altitude of 30 km. The computational domain consists of infinite rows of film cooling holes on the bottom of a blunt-nosed slab. Laminar and several turbulent calculations have been performed and compared. The influence of blowing ratios on the film cooling effectiveness is investigated. The results exhibit that the film cooling technique could be an effective method for an active cooling of blunt-nosed bodies in hypersonic flows.

Download Full-text

Effects of viscous dissipation and convective heating on convection flow of a second grade liquid over a stretching surface: Analytical and numerical study

Scientia Iranica ◽

10.24200/sci.2018.20414 ◽

2018 ◽

Vol 0 (0) ◽

pp. 0-0 ◽

Cited By ~ 1

Author(s):

S. Eswaramoorthi ◽

S. Sivasankaran ◽

S. Rajan ◽

Ali Saleh Alshomrani ◽

M. Bhuvaneswari

Keyword(s):

Viscous Dissipation ◽

Numerical Study ◽

Second Grade ◽

Convection Flow ◽

Convective Heating ◽

Stretching Surface

Download Full-text

Numerical study on three-dimensional flow of nanofluid past a convectively heated exponentially stretching sheet

Canadian Journal of Physics ◽

10.1139/cjp-2014-0433 ◽

2015 ◽

Vol 93 (10) ◽

pp. 1131-1137 ◽

Cited By ~ 6

Author(s):

Junaid Ahmad Khan ◽

M. Mustafa ◽

T. Hayat ◽

A. Alsaedi

Keyword(s):

Boundary Layer ◽

Stretching Sheet ◽

Numerical Solutions ◽

Volume Fraction ◽

Numerical Study ◽

Heat Transfer Analysis ◽

Convective Heating ◽

Nanoparticle Volume Fraction ◽

Exponentially Stretching Sheet ◽

Exponentially Stretching

A theoretical study on the boundary layer flow of nanofluid past a bi-directional exponentially stretching sheet is presented. Heat transfer analysis via convective boundary conditions is performed. Further, the recently proposed boundary condition by Kuznetsov and Nield (Int. J. Therm. Sci. 77, 126 (2014)) is considered, which requires nanoparticle volume fraction at the wall to be passively rather than actively controlled. The resultant boundary layer equations are non-dimensionalized and then solved for the numerical solutions. The results are found in excellent agreement with the existing studies in the literature. It is seen that the thermal boundary layer is largely influenced by the variations in the convective heating at the sheet. Moreover the nanoparticle volume fraction is found to be in the vicinity of the bounding surface.

Download Full-text