On the basis of the one dimension flow theory,using non dimension equation of the hydraulic torque converter,this paper is intended to do research on the calculation method of the recverse rotation condition of the composite hydraulic torque converter. And the practical calculation and test on the hydraulic torque converter of a type of military track vehicle are made. The paper also carries out the feasibility analysis of the reverse rotation condition brake of the hydraulic torque converter by use of the test results.

In this paper,the non dimension correlation formula is proposed for determining liquid solid mass transfer coefficients in empty tubes with an electrochemical process,and its feasibility is tested and verified.

This paper presents ignition formula in non homogeneous phase with a big char particle used by non dimension analysis method. It also gives simplified calculating equation of ignition temperature in non homogeneous phase which utilizes coal characteristics index ( Fz ), its calculating error can reach below 7.35%.

The paper,based on the approximate state equation of high temperature airfrom Bade,directly deduces formulas of one dimensional flow and normal shockwave for are heater and arc wind tunnel from the fundamental equation ofgasdynamics and thermodynamics,and draws up charts in non-dimension.Theprincipal features of these relations are that the relations among the physicalquantities are very clear and are very convenient to calculate quantitatively;thatall the physical quantities are closely connected...

The paper,based on the approximate state equation of high temperature airfrom Bade,directly deduces formulas of one dimensional flow and normal shockwave for are heater and arc wind tunnel from the fundamental equation ofgasdynamics and thermodynamics,and draws up charts in non-dimension.Theprincipal features of these relations are that the relations among the physicalquantities are very clear and are very convenient to calculate quantitatively;thatall the physical quantities are closely connected with geometrical parameters,hence they are very simple in application;that they may be compared with theequations for common temperature ideal gas,which draws out real-gas effects;that they will get quite accurate results by a proper selection of the α values.

The axfal length of three-dimensional impellers in centrifugal compressors is an important geometry parameter for the impeller design with high efficiency and saving energy. To a greater degree, the flow behavior in an impeller and its performance depend on the axial length. If the axial length is too long or short, it will cause that the flow in an impeller is deteriorated and the performance is no good. So it is very important to select axial length in three-dimensional impeller design. In order to explore...

The axfal length of three-dimensional impellers in centrifugal compressors is an important geometry parameter for the impeller design with high efficiency and saving energy. To a greater degree, the flow behavior in an impeller and its performance depend on the axial length. If the axial length is too long or short, it will cause that the flow in an impeller is deteriorated and the performance is no good. So it is very important to select axial length in three-dimensional impeller design. In order to explore the axial length influence on the performance of impeller, flow behavior in different axial length impelllers are compared. It shows that in the case of the optimal axial length the diffusion ratio and the maximum Mach number at the entrance of the impellers are minimum and flow behavior is better. Truckenbradt equation is used to calculate the boundary layer momentum thickness and reference momentum thickness. It illustrates that at the optimal axial length the two thicknesses are minimum. Comparing with the parameters△W/ Wm and W1/W2 which control the separation region, at the condition of that △ω/ωm<1is satisfied, w1/w2 is minimum, i. e. separation region is minimum and flow behavior is good. The formulars of choosing the optimal length and equivalent optimal average load in an unit length are deduced. According to the method mentioned above, three samples are provided. They demonstrate that the non-dimension performance curves are flat, the operation regions are wide and the maximum polytropic efficiency of stage is all above 84%. By comparing with the results of experiments the feasibility of the formulars are verified.

The mechnical analysis was made to two types of structure modelsof oblique and plane seams pitched with rectangular slab stones, in regard to the condi-tions of waves and water flows, thus the basic mechanical equilibrium relationship ofcritical stability of stones was obtained. On the basis of 40 varied structure sectionmodels and 1,380 times of wave model test was then made non-dimension analysis ofrelevant factors which may affact the thickness of pitched stones. As a result, thecalculation formula...

The mechnical analysis was made to two types of structure modelsof oblique and plane seams pitched with rectangular slab stones, in regard to the condi-tions of waves and water flows, thus the basic mechanical equilibrium relationship ofcritical stability of stones was obtained. On the basis of 40 varied structure sectionmodels and 1,380 times of wave model test was then made non-dimension analysis ofrelevant factors which may affact the thickness of pitched stones. As a result, thecalculation formula for determing the thickness of building pitching stones were putforward, which may provide a theoretical framework for engineering design of break-waters. Besides, some experimental results about the standard for breakwater design aswell as some analytic ideas were also provided in this paper.