Showing papers on "Slip ratio published in 1981"
TL;DR: In this article, the effects of velocity slip on the static performance as well as on the dynamic performance of the bearings are determined, and the slip coefficient is treated as an independent parameter and the porosity and the ratio of clearance to journal radius are the other factors which determine the effect of slip.
21 citations
TL;DR: In this article, the slip boundary condition was examined to find its influence on the solution of flow problems when there is a rotational body force field and two specific examples are considered having different force distributions that are generated electromagnetically.
6 citations
Patent•
20 Feb 1981
TL;DR: In this article, a feedback passage on the way of which an EGR valve 14 is equipped connects intake and exhaust pipes of an engine and the valve is opened or closed under control of a solenoid 22 initiated by a controller 24.
Abstract: PURPOSE:To provide the proper exhaust gas recirculation (EGR) according to the operation conditions of an automobile with a torque convertor by regulating the quantity of the recirculated exhaust gas depending on the slip rate of the torque convertor. CONSTITUTION:A feedback passage 13 on the way of which an EGR valve 14 is equipped connects intake and exhaust pipes 11, 12 of an engine. The valve 14 is opened or closed under control of a solenoid 22 initiated by a controller 24. The controller 24 detects a slip ratio of a torque convertor by the signal on revolutional frequencies of right and left axles of an automobile, a propeller shaft and an engine. It is well known that as the slip ratio increases, greater load is applied to the engine and greater amount of NOx is generated. To restrict the production of NOx, the EGR valve 14 is regulated to be opened more widely as the slip ratio increases.
5 citations
Patent•
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27 Mar 1981
TL;DR: In this article, ground speeds are detected with Doppler modules provided parallel with the body of a vehicle so arranged to deviate one polarization surface by a specified angle, for example 90 deg.
Abstract: PURPOSE:To obtain a correct ratio getting rid of fading effect by selecting outputting speed signals larger in the level corresponding to ground speeds detected with two Doppler modules so arranged to deviate the polarized surfaces by a specified angle from each other. CONSTITUTION:Ground speeds are detected with Doppler modules 5 and 6 provided parallel with the body of a vehicle so arranged to deviate one polarization surface by a specified angle, for example 90 deg., and corresponding speed signals ea and eb are separately inputted into Schmitt trigger circuits 13 and 14 and detectors 15 and 16. Square wave signals Pa and Pb from Schmitt trigger circuits 13 and 14 are inputted to frequency voltage converters 17 and 18 and analog signals Va and Vb are applied to analog switches 20 and 21. On the other hand, a comparator 19 turns on a switch 21 to select a signal Vb when ea' eb' as true ground speeds respectively. This allows a slip ratio es to be obtained from a Vc/drive wheel speed signal Vd free from any fading effect.
3 citations
01 Jan 1981
TL;DR: In this article, a transient turbine meter model was applied to calculate two-phase mass flux from test data at the Thermal Hydraulic Test Facility (THTF) and compared with homogeneous models based on measured average density and volumetric flow rate in an effort to determine uncertainites introduced by two phase flow effects such as slip ratio and void fraction.
Abstract: A transient turbine meter model by Kamath and Lahey was applied to calculate two-phase mass flux from test data at the Thermal Hydraulic Test Facility (THTF). Comparisons are made with homogeneous models based on measured average density and volumetric flow rate in an effort to determine uncertainites introduced by two-phase flow effects such as slip ratio and void fraction.
1 citations
TL;DR: In this article, the incompressible slip flow past a finite flat plate at zero incidence and at low Reynolds numbers is treated in the Oseen approximation, and an analytical expression of the shear stress at the wall is obtained by the integral Fourier transform method.
Abstract: The incompressible slip flow past a finite flat plate at zero incidence and at low Reynolds numbers is treated in the Oseen approximation. An analytical expression of the shear stress at the wall is obtained by the integral Fourier transform method. The drag coefficient, the velocity perturbations and the thermal field are numerically evaluated.
1 citations