...Guoqing Li; Ang Li; Shen Zhang; Chenfeng Wang; Xingen Lu Under the influence of secondary flow, the film cooling deviates from the flow direction on the turbine blade, which directly results in undesirable uneven film coverage. On the pressure side, the film appears divergent, while on the suction...

... number Gr can be written as (20) Gr   = g d inner 3 α v Δ t ν 2 Turbulent kinetic energy is a measure of fluid mixing degree, which is proportional to the intensity of the secondary flow and heat transfer performance of the fluid, as presented in Fig. 11...

... secondary flow Nusselt number temperature thermal performance factor In gas turbine engine, the turbine inlet temperature has been closed to 2000 K for advanced gas turbines, which is far beyond the melting point of gas turbine blades and vanes. Consequently, it is necessary to continuously...

... value, which is called the “crest value” for the axial velocity. The crest value is the result of the boundary layer, secondary flow, and stochastic motion caused by the turbulence. Second, in the heated zone, the axial velocity is constant for the constant properties fluid, but increases gradually...

... H will not increase Se m efficiently, but only result in a great pressure loss. Fig. 13 The effect of H on heat transfer performance and efficiency of secondary flow under different Re Secondary flow is important in convective heat transfer enhancement. It is necessary to find...

...—termed as the short channel. Multiple secondary flow patterns develop in the curved section of the channel, which in conjunction with the bulk axial flow, lead to the formation of multiple vortices and separation bubbles. The complex 3-D flow structures, as well as the variable c/s area of the curved...

...Zhi-Min Lin; Liang-Bi Wang The secondary flow has been used frequently to enhance the convective heat transfer, and at the same flow condition, the intensity of convective heat transfer closely depends on the thermal boundary conditions. Thus far, there is less reported information about...

... are systematically evaluated, and the heat transfer and pressure loss characteristics are investigated. It is found that counter-rotating streamwise vortices are induced by the wavy walls, and the flow field has been drastically modified due to the intense secondary flow. By using the optimum set of oblique angle...

... ′ ( Dn ′ = Re ′ δ 1 ∕ 2 ) increases. These oscillatory characters of the wall temperature are due to the circulatory secondary flows resulting from the centrifugal force. The sharp variation in the wall temperature appears since the strong secondary flow brings the test liquid particles...