Skin Friction Measurements Using Oil Film Interferometry in a 3-D Supersonic Flowfield

Piston Ring Friction Analysis from Oil Film Thickness Measurements by

The oil film behavior of a series of fifteen lubricating oils was tested in a single cylinder spark ignition engine. The oil film thickness between the piston and cylinder liner of this engine was observed using the Laser Induced Fluorescence (LIF) technique. The data was examined for correlations between physical properties of the oil and characteristics of the oil film. The region of the oil ...

The Measurement of Skin Supersonic Flow by means of Film Gauges Friction in Heated q'hin

The application of heated thin film gauges to the measurement of mean skin friction in compressible flow is described. It is shown that the calibration of the gauges is independent of Mach number, at least up to M = 3, provided the fluid properties are calculated at the appropriate film temperature. The gauges are calibrated by reference ~ surface tubes and also by comparison with the theoretic...

P LASTIC FILM TEXTURE MEASUREMENT USING 3 D PROFILOMETRY Prepared

Laser plasma density measurements using interferometry

Fabrication of an interferometer is planned at the UCSD Laser Plasma and Laser-Matter Interactions Laboratory. The primary goal of this project is to measure the density at early times in the evolution of highly transient laser created plasmas. We describe the design concepts and details of different kinds of interferometer for measuring density evolution, especially during early time of plasma...

Process Improvement of Experimental Measurements Using D-optimal Models

In this paper, the application of D-optimal models, as an alternative to response surface models (RS models) for design of experiment (DOE) was examined. Two D-optimal models for tilt-rotors in the wind tunnel experiment, as a form of quadratic functions, were generated based on a chosen optimality criterion. This optimality criterion was used to generate the optimized sampled points in the des...