Particle image velocimetry (PIV) is used to measure the instantaneous two-dimensional velocity field in turbulent, planar mixing layers at varying levels of compressibility. The structure of the instantaneous velocity and vorticity fields are seen to display similar variation with compressibility as the scalar field, with the spatial intermittency of the velocity field tied to the interfaces of...

SUMMARY Details are given of the static calibration of a hemispherrcal-headed drfferentral pressure yawmeter, 0.6 to 1.2; rn the Mach number range from the xnstrument has a central pitot pressure hole and two pairs of holes m perpendroular planes for flow directron measurement. The results show that ths sensitivity to yaw (for angles up to 8') as determined from pressure differences between opp...

Utilizing the Young’s double slits and Mach-Zehnder interferometer, we proposed an experimental method to measure the generalized Stokes parameters of a radially polarized random electromagnetic beam. After the partially coherent beam propagating through the Young’s double slits, the interference fringe is obtained by the help of a Mach-Zehnder interferometer consisting of apertures, quarter-wa...

The results of an investigation of the performance of a time-division-addressed fiber-optic gas-sensor array by means of wavelength modulation of a distributed-feedback (DFB) laser are reported. The system performance is found to be severely limited by the extinction ratio of the optical switch used for pulse amplitude modulation. Formulas that relate the cross-talk level to the extinction rati...

In this paper, the performance of an ultra-fast all-optical symmetric Mach Zehnder (SMZ) interferometer employed as a demultiplexer and/or a switch in an OTDM network is investigated by means of controlling the power of the control pulses. Employing control signals with optimum unequal powers results in reduced residual crosstalk, thus leading to improved bit error rate (BER) performance and re...

Computational fluid dynamics simulations using the WENO-LF method are applied to high Mach number nonrelativistic astrophysical jets, including the effects of radiative cooling. Our numerical methods have allowed us to simulate astrophysical jets at much higher Mach numbers than have been attained (Mach 20) in the literature. Our simulations of the HH 1-2 astrophysical jets are at Mach 80. Simu...

Due to the increasing growth of processing cores in complex computational systems, all the connection converted bottleneck for all systems. With the protection of progressing and constructing complex photonic connection on chip, optical data transmission is the best choice for replacing with electrical interconnection for the reason of gathering connection with a high bandwidth and insertion lo...

In this chapter, we propose a new concurrent programming approach called MACH (multi-agent extended chemical abstract machine). MACH extends the chemical abstract machine with multiple coexisting agents. This paper focuses on the design, implementation, and verification of MACH. The aim of MACH is to develop a reactive programming language based on an interactive computational model, which we b...

Shock reflection is a fundamental phenomenon in studying compressible flow. Since Ernst Mach first studied the reflection phenomena of shock waves in 1878 [6] great amount of research works on such phenomena, mainly experiments and computations, was proceeded. In gas dynamics when a shock wave meets an obstacle in its propagation process the shock reflection occurs generally. There are various ...