Under zero or small positive incidence angle flow conditions, the calculated isentropic Mach number at 50% blade's height gets closer to experimental values if the κ-ε model is used instead of the κ-ε model.

Results of numerical analysis show that,under large negative incidence angle flow conditions,separation at leading edge's pressure surface can not been predicted by means of κ-ε models.

In this paper, two improved schemes, 73B and 73A, high pressure No. 9 guide cascade of 300mw unit contrast annular cascade experimental investigation that were conditioned on angle of attack at -20°,0°and +20°.

The surface composition of the blend films was determined by Fourier transform infra-red spectroscopy coupled with a variable incidence angle attenuated total reflection accessory (ATR-FTIR).

The effects of the laser radiation intensity, dimensions of the laser spot, and the incidence angle on the amplitude, shape, and width of the acoustic pulse have been studied.

The reflection and transmission matrices for mul-tilayered structures are obtained for the general case of an arbitrary incidence angle.

It is shown that the variations of the incidence angle, magnetization orientation, and polarization plane substantially affect the polarization characteristics and give rise to typical features in the dependences studied.

From the experimental data, dependences of the sputtering yield of these materials on the incidence angle and ion energy have been obtained and the surface relief patterns produced by target etching have been studied.

We give equations which make it possible to reduce the problem of determining the aerodynamic characteristics of a body which is not axisymmetric to the problem of computing the flow past an equivalent body of rotation at zero angle of incidence.

The problem of the nonuniqueness of the angle of incidence of a fine jet into water is considered and the mathematical formulation of the problem is improved.

Since the angle of incidence of the shock wave αs coincides in the zero-order approximation with the angle of inclination of the bodys [1], the latter is usually used in the boundary conditions on the shock.

Dependences were obtained relating the probability of collision of the particles to the angle of incidence with the surface, their diameter, and the characteristic dimensions of the body in the flow, and also to their concentration.

The generalized Maxwell boundary condition that takes into account the dependence of the accommodation coefficient on the angle of incidence of gas molecules is considered as an example.

In this article, the principle of bydro-electrical analogy is brieply disscussed. Besides, thewhole experimental set-up of F?culty of compressor Specialiation is discribed in detail, and theaxperimental techniquea is sysematically analized. By this set-up, we made at investigation on tbe K-1 Profile lattice, and got the directionand the velocity distribution around the profile at zero angle of attack, By the method of"Wenig" the velocity picture at any angle of attack was calculateel and Presented. In this article,...

In this article, the principle of bydro-electrical analogy is brieply disscussed. Besides, thewhole experimental set-up of F?culty of compressor Specialiation is discribed in detail, and theaxperimental techniquea is sysematically analized. By this set-up, we made at investigation on tbe K-1 Profile lattice, and got the directionand the velocity distribution around the profile at zero angle of attack, By the method of"Wenig" the velocity picture at any angle of attack was calculateel and Presented. In this article, Tbe problms of electrical field and the p?ase angle compensation arealao discussed.

A simple nonlinear wing theory for the low-aspect-ratio rectangular flat plate with large angle of attack in incompressible flow is developed. The plate is replaced by a finite number of horseshoe vortex lines which are located along the chord of the plate and which are of different strength. The free parts of the vortex lines make an angle θ with the plate. For the solution of the problem an iterative procedure is applied. The angle θ is initially assumed to be one half of the angle of attack and the first...

A simple nonlinear wing theory for the low-aspect-ratio rectangular flat plate with large angle of attack in incompressible flow is developed. The plate is replaced by a finite number of horseshoe vortex lines which are located along the chord of the plate and which are of different strength. The free parts of the vortex lines make an angle θ with the plate. For the solution of the problem an iterative procedure is applied. The angle θ is initially assumed to be one half of the angle of attack and the first approximate values for the strength of the vortex lines are computed. By application of the Helmholtz principle at the side edges of the plate, the second approximate value for the angle θ is determined. By repeating this calculation, the second approximate values for the strength of the vortex lines and then the aerodynamic coefficients of the plate are obtained. A few examples are calculated and the theoretical results are compared with the experimental ones. It is shown that for low-aspect-ratio rectangular plates this theory agrees very well with the experiments.

The paper describes the regularity of the effect of the impeller inlet and exit parameters and of the form of diffusion casing on the pump characteristic and efficiency. This regularity was initially obtained by means of hydraulic model experimental investigation.In order to improve the efficiency of submersible pump, wemay adopt measures to coutract the inlet diameter De, to increase the setting angle of the blade, and to extend the blade to the inlet edge so that the characteristic requirement can be fulfilled.This...

The paper describes the regularity of the effect of the impeller inlet and exit parameters and of the form of diffusion casing on the pump characteristic and efficiency. This regularity was initially obtained by means of hydraulic model experimental investigation.In order to improve the efficiency of submersible pump, wemay adopt measures to coutract the inlet diameter De, to increase the setting angle of the blade, and to extend the blade to the inlet edge so that the characteristic requirement can be fulfilled.This paper recommends inlet velocity coefficient ko in the region 3.7～4.1, the blade angle of attack 8°～15°. The form of inlet edge between two vanes should be sguare and then better hydraulic characteristics are obtained.Since the energy exchange in the diffusion casing was not so reasonable, the authors think that the formula for calcutating the outer diameter De of centrifugal pump impeller must be revised theoretically so that the characteristic requirement can be reached, This paper recommends velocity coefficient under several specific speeds ns.The relationship between the throat area F3 of diffusion casing and impeller exit area F2 is one of the important factors deciding the characteristics of the submersible pump.This paper recommends F3/F2 in the region 0.7～1. There is no oscillation or noise no matter whether the number of vanes in the diffusion casing and impeller are the same or not.