2013 1(12)

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Sakhnov A.Y.

Institute of Thermophysics SB RAS, Novosibirsk, Russia


Sakhnov A.Y. Laminar boundary layer with favorable pressure gradient on the uniformly heated surface / A.Y. Sakhnov // Modern Science: Researches, Ideas, Results, Technologies. - Dnepropetrovsk: SPIC "Triacon". - 2013. - Iss. #1(12). - PP. 220 - 224


boundary layer; favorable pressure gradient; temperature factor


The results of numerical research of accelerated flow on heated flat plate with constant temperature are presented in the work. It is shown simultaneous influence of favorable pressure gradient and non-isothermal conditions on a boundary layer leads to increasing of skin-friction coefficient and Stanton number in relation to accelerated quasi-isothermal boundary layer. At this, velocity and temperature profiles become more filled. In the case of considerable acceleration of the flow and significant heating of the wall the velocity profile is deformed next way: the velocity in the boundary layer become higher than that in the potential flow. The deformation of longitudinal velocity profile in laminarized flow can be over 20 %. It is suggested a simple analytical formula for calculation of skin-friction coefficient in asymptotic flow. The formula takes into account simultaneously influence of favorable pressure gradient and temperature factor.


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