Ultra-high-speed time-resolved PIV of turbulent flows using a continuously pulsing fiber laser

High-speed Imaging and Piv Measurements in Turbulent Cavitating Flows around 2d Hydrofoils

The paper reports on high-speed imaging and PIV study of cavitating flows around a flat plate with semicircular leading edge and a NACA0015 hydrofoil. Both foils were investigated at a series of attack angles ranging from 0 to 9° with varying cavitation number. Several known types of cavitation common to both foils, but also some different patterns, were registered. At small angles of incidence...

High Speed Thin Metal Cutting using Fiber Laser Technology

There are several methods available for precision cutting of thin metals less than 0.06-inch thick used for these applications, which include materials such as stainless steel, titanium, nickel, and aluminum. The major options, lasers, electric discharge machining (EDM), water-jet, and chemical machining each have a role to play. However, precision fiber laser cutting technology is now emerging...

Size Distribution Measurement of Candle\'s Soot Nanoparticles by Using Time Resolved Laser Induced Incandescence

Time resolved laser induced incandescence (LII) technique is used to measure size distribution of soot nanoparticles of candle's flame. Pulsed Nd:YAG laser is used to heat nanoparticles to incandescence temperature and the resulting signal is measured. Mass and energy balance equations are numerically solved to calculate temperature of soot particles in low fluence regime. Assuming Plank black ...

Pdf Methods for Combustion in High-speed Turbulent Flows

Simulating turbulent viscous high–speed flows on unstructured grids

This paper discusses ongoing work on an all-Mach number, non–dissipative algorithm to solve compressible flows on unstructured grids. The algorithm is capable of handling unstructured grids, which allow efficient and speedy generation of computational meshes for complex geometries. The novel feature of the algorithm is an incompressible scaling for pressure that naturally yields the divergence–...