An analog computer for use with x-array hot wire anemometers

The design of an analog computer is presented which accurately reduces the output signals of an X-array hot wire anemometer into their basic components and calculates their auto- and cross correlations in both time averaged and instantaneous form. A prototype model is shown with certain unique features such as simultaneously available multiple outputs which give it a distinct superiority over commercially available units. (Author)http://archive.org/details/analogcomputerfo00hokeNAN

An analytical study of incompressible free turbulent mixing in adverse and favorable pressure gradients

The equations governing free turbulent mixing are derived from the Navier-Stokes equations and transformed into a mathematical plane which is explicitly independent of the eddy viscosity model. The coupled momentum and turbulent kinetic energy equations are analytically solved in the transformed plane by a perturbation technique and subsequently retransformed into physical space based on a hypothesized dependence of the eddy viscosity on the turbulent kinetic energy. The adequacy of a given model in reproducing the velocity and turbulent kinetic energy field is assessed by comparing the results of the analysis with some experimental data of planar turbulent wake mixing in constant adverse and favorable pressure gradients. (Author)http://archive.org/details/analyticalstudyo00hokeNAN

Numerical experiments with the two- and three-dimensional unsteady navier-Stokes equation

The two- and three-dimensional unsteady Navier-Stokes equations are solved numerically for the flow field about an impulsively started flat plate. In attempting to obtain an exact time dependent solution, several significant results were observed. First, with regard to the formulation of the differential equations themselves, it appears that Poisson's equation for the pressure field is a fundamental equation in as much as it allows us to solve for pressure moat exactly at any given time. Secondly, the difference equations must be carefully and consistently formulated. In this research, a non-uniform lateral grid, a unique interpretation of the continuity equation, and leap frog integration in time proved to be valuable techniques in obtaining an exact solution. (Author)http://archive.org/details/numericalexperim00hok

A new fluid mechanics laboratory in the Department of Aeronautics

A brief description of four new experimental fluid mechanics facilities in the Naval Postgraduate School, Department of Aeronautics is presented. Each of the facilities was developed with the capability of studying one classical flow situation thoroughly and extended to include a variety of complex secondary effects which are of current interest. (Author)http://archive.org/details/newfluidmechanic00hok

Hypersonic laminar heat transfer

The results of an analog computer study of hypersonic laminar heat transfer including the effects of pressure gradient, mass transfer, velocity slip, Prandtl number, and wall temperature are presented. Reynolds analogy factors and adiabatic wall enthalpy results are included for all combinations of the aforementioned effects. In addition, an auxiliary correlation is presented which simplifies the specification of the Reynolds analogy factor with velocity slip. All the computations were performed on the EAI 580 analog computer. (Author)http://archive.org/details/hypersoniclamina00hokeN