Journal of Fluids Engineering: Recent submissions
Now showing items 8401-8420 of 9024
-
A Wind-Tunnel Study of the Effect of Gap Flow and Gap Seals on the Aerodynamic Drag of Tractor-Trailer Trucks
(The American Society of Mechanical Engineers (ASME), 1978)The effect of gap width on the aerodynamic drag of a cab-over-engine tractor-trailer combination has been investigated for full-scale gap widths ranging from 0.61 m (24 in) to 1.83 m (72 in.) ... -
Exact and Approximate Equations for Real-Fluid Isentropic Flow
(The American Society of Mechanical Engineers (ASME), 1978)Two sets of exact isentropic-flow equations are developed, corresponding respectively to the Tait-Kirkwood equation (P + B) vkT = constant and to the Laplace-Poisson equation PvkL = constant. ... -
The Computation of Optimum Pressure Recovery in Two-Dimensional Diffusers
(The American Society of Mechanical Engineers (ASME), 1978)A method is presented for computation of optimum recovery at fixed length (Cp *) in two-dimensional diffusers with incompressible flow and turbulent inlet boundary layers. Since Cp * lies in ... -
Theoretical Contributions to the Study of Gas-Lubricated Journal Bearings
(The American Society of Mechanical Engineers (ASME), 1962)As a theoretical study of the hydrodynamic, gas-lubricated journal bearings, the paper presents approximate solutions with fair accuracy for high values of eccentricity ratio. In addition, an ... -
An Experimental Study of the Flow-Induced Motions of a Flexible Cylinder in Axial Flow
(The American Society of Mechanical Engineers (ASME), 1978)Experimental studies of the flow-induced lateral motions of a flexible tube in parallel flow are reported. The experiments were conducted in a 19.05 cm diameter test section of a blow-down ... -
A Method for Correlating the Characteristics of Centrifugal Pumps in Two-Phase Flow
(The American Society of Mechanical Engineers (ASME), 1978)The semiempirical method described combines the ideal performance of a centrifugal pump with experimental data for single and two-phase flow to produce a so-called “head-loss ratio,” which is ... -
On the Flow Regimes of Downhole Flow of a Gas-Particle Mixture
(The American Society of Mechanical Engineers (ASME), 1978)Assuming that a gas-particle mixture behaves like a homogeneous gas, in which the slip velocity of the particles is negligible, the various flow regimes in one-dimensional downhole flow, including ... -
Discussion: “Solutions of Laminar Jet Flow Problems for Non-Newtonian Power Law Fluids” (Mitwally, E. M., 1978, ASME J. Fluids Eng., 100, pp. 363–366)
(The American Society of Mechanical Engineers (ASME), 1978) -
Erratum: “On the Growth of Steam Droplets Formed in a Laval Nozzle Using Both Static Pressure and Light Scattering Measurements” (Journal of Fluids Engineering, 1978, 100, pp. 311–322)
(The American Society of Mechanical Engineers (ASME), 1978) -
On the Optimization of the Stiffness of Externally Pressurized Bearings
(The American Society of Mechanical Engineers (ASME), 1962)This paper presents theoretical studies of the method of optimization of the stiffness of externally pressurized bearings. When an externally pressurized bearing is designed to operate at any ... -
Counterrotating Journal Bearings
(The American Society of Mechanical Engineers (ASME), 1962)A theoretical derivation is given showing that whenever the center of curvature of a bearing does not coincide with its center of rotation, synchronous counterrotation will produce a load ... -
Optimal Control Methods for On-Off Sampling Systems
(The American Society of Mechanical Engineers (ASME), 1962)This paper considers the problem of optimal (minimum-time) on-off regulation of a dynamic plant whose state is known only at periodic instants of time. It is shown that on-off control inputs ... -
Minimum Time Control of Second Order Pulse-Width-Modulated Sampled-Data Systems
(The American Society of Mechanical Engineers (ASME), 1962)This paper treats the minimal time control problem for two second order pulse-width-modulated sampled-data systems, one with a double integrator type plant and one with a plant described by an ... -
Optimizing Control of Single Input Extremum Systems
(The American Society of Mechanical Engineers (ASME), 1962)The idea of direct optimization is briefly presented and an introduction given to the divider-optimizer. By investigation of the operating principles of the divider-optimizer, it is shown that ... -
On the Periodic Modes of Oscillation in Pulse-Width-Modulated Feedback Systems
(The American Society of Mechanical Engineers (ASME), 1962)A general procedure for obtaining information on the periodic modes of oscillation in PWM and nonlinear sampled-data feedback systems is considered in this paper. Based on the equivalence of ... -
Stability of a Nonlinear Feedback System in the Presence of Gaussian Noise
(The American Society of Mechanical Engineers (ASME), 1962)A stability criterion for certain types of nonlinear feedback systems in the presence of Gaussian noise is established here. This criterion may be considered as a natural extension of the ... -
Derived-Rate Increment Stabilization: Its Application to the Attitude Control Problem
(The American Society of Mechanical Engineers (ASME), 1962)A gyro-free nonlinear attitude control system for a spacecraft is analyzed. On-off jet actuators are used. Hysteresis and a dead zone are intentionally put into the system. Under certain ... -
Gyroscopic Coupling in Space Vehicle Attitude Control Systems
(The American Society of Mechanical Engineers (ASME), 1962)The problem of controlling the attitude of a space vehicle is unusual in several respects. While the required precision may be extreme—less than 0.1 second of arc in certain cases—the required ... -
A Successive Approximation Technique for Optimal Control Systems Subject to Input Saturation
(The American Society of Mechanical Engineers (ASME), 1962)A class of problems that has received considerable attention in recent years from both control theorists and engineers is the following: Given ẋ = Fx + du, x(0) = cDetermine |u(t)| ≤ 1 ... -
A Switching Criterion for Certain Time-Optimal Regulating Systems
(The American Society of Mechanical Engineers (ASME), 1962)A rule for computing the initial relay position for time-optimal regulation corresponding to any set of initial conditions without solving the transcendental switching equations is presented. The ...