The aim of this work is to study the effect of non-uniform single and double slot suction/injection into a steady mixed convection boundary layer flow over a vertical cone, while the axis of the cone is inline with th...The aim of this work is to study the effect of non-uniform single and double slot suction/injection into a steady mixed convection boundary layer flow over a vertical cone, while the axis of the cone is inline with the flow. The governing boundary layer equations are transformed into a non-dimensional form by a group of non-similar trans- formations. The resulting coupled non-linear partial differential equations are solved nu- merically by employing the quasi-linearization technique and an implicit finite-difference scheme. Numerical computations are performed for different values of the dimensionless parameters to display the velocity and temperature profiles graphically. Also, numerical results are presented for the skin friction and heat transfer coefficients. Results indicate that the skin friction and heat transfer coefficients increase with non-uniform slot suction, but the effect of non-uniform slot injection is just opposite.展开更多
By referring to all kinds of research data and summarizing the analysis and research of various kinds of distribution disks,a new type of distribution disc with double V-shaped unloading slots is designed again.Then,t...By referring to all kinds of research data and summarizing the analysis and research of various kinds of distribution disks,a new type of distribution disc with double V-shaped unloading slots is designed again.Then,the new designed disk is loaded into the piston pump by CFD software to simulate.Finally,through simulation,it is concluded that the width of the triangle slot of the distribution plate is about 10°,the slope angle is about 12°,and the diameter of the unloading hole is about 0.8mm.When the diameter of the perforated hole is about 1.5mm,the flow curve of the unloading hole is the smoother.Pressure shock and noise are also minimized at this time.Draw By improving the damping tank,the flow noise and cavitation change are smaller than before.展开更多
文摘The aim of this work is to study the effect of non-uniform single and double slot suction/injection into a steady mixed convection boundary layer flow over a vertical cone, while the axis of the cone is inline with the flow. The governing boundary layer equations are transformed into a non-dimensional form by a group of non-similar trans- formations. The resulting coupled non-linear partial differential equations are solved nu- merically by employing the quasi-linearization technique and an implicit finite-difference scheme. Numerical computations are performed for different values of the dimensionless parameters to display the velocity and temperature profiles graphically. Also, numerical results are presented for the skin friction and heat transfer coefficients. Results indicate that the skin friction and heat transfer coefficients increase with non-uniform slot suction, but the effect of non-uniform slot injection is just opposite.
基金The Regional Joint Foundation plan of the Provincial Natural Science Foundation in 2022“Study on the characteristics of hydraulic frequency conversion vibrator for rotary valve distribution”(2022-YKLH-07)The Basic Scientific research Project of the Provincial Department of Education in 2023“Analysis of voltage control characteristics and transient temperature of electro-hydraulic transmission”(JYTMS20230063).
文摘By referring to all kinds of research data and summarizing the analysis and research of various kinds of distribution disks,a new type of distribution disc with double V-shaped unloading slots is designed again.Then,the new designed disk is loaded into the piston pump by CFD software to simulate.Finally,through simulation,it is concluded that the width of the triangle slot of the distribution plate is about 10°,the slope angle is about 12°,and the diameter of the unloading hole is about 0.8mm.When the diameter of the perforated hole is about 1.5mm,the flow curve of the unloading hole is the smoother.Pressure shock and noise are also minimized at this time.Draw By improving the damping tank,the flow noise and cavitation change are smaller than before.
