Optical Methods in Dynamics of Fluids and Solids: Proceedings of an International Symposium, Held at the Institute of Thermomechanics Czechoslovak Aca

ISBN-13: 9783642824616 / Angielski / Miękka / 2011 / 386 str.

M. Pichal

Opis

The General Assembly of the International Union of Theoreti cal and Applied Mechanics decided in Cambridge, United King dom, in 1982 to arrange the Symposium on Optical Methods in the Dynamics of Fluids and Solids. This decision was stimu lated by the fact that optical diagnostic methods are a more and more important tool in experimental mechanics. In contrast to the foregoing Symposium in Poitiers. 1976, which was devoted exclusively to optical methods in the me chanics of solids, it was a fruitful idea to bring together during the present Symposium scientists engaged in optical methods in the dynamics of all phases. It was proposed by the International Scientific Committee of the Symposium that contributions in experimental fluid dynamics should deal with transition from laminar to turbu lent flow, compressible fluid flow including high temperatu re flow, non-equilibrium phenomena in fluid dynamics and the interaction of fluid flow with solid boundaries and bodies. As regard. the mechanics of solids, the contributions should deal with the application of optical methods in the wave propagation in shock loaded bodies, in phenomena connected with the fracture mechanism, in nonstationary Vibrations of elements and parts of systems and in nonstationary strains in structures. The International Scientific Committee preferred to avoid invited lectures and in cooperation with the National Com mittees of IUTAM called for contribution from individual countries."

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Spis treści

Optical methods in fluid and solid dynamics research.- Space resolved probing of gas concentration and temperature structures.- Holographic interferometry studies of the temperature field near a condensing bubble.- Laser raman techniques for gas phase fluid dynamics and combustion research.- Applied holography for drop formation of non-newtonian fluids in centrifugal atomizers.- Holographic mode shape investigation of aircraft engine impellers.- A study of heat transfer from a horizontal vibrating cylinder by means of holographic interferometry.- Study of diffraction of shock waves, at rounded corners by means of schlieren and interferometric methods.- Study of shock wave reflection in rectangular channels by means of Cranz-Schardin system in parallel beams.- Experience with laboratory LDA by measuring flow fields in rotating turbomachinery.- Application of laser-dual-focus velocimetry in a counterflow.- Laser-doppler velocimetry and flow visualization of 3-D flows.- Laser diagnostics of molecular states in non-equilibrium gas flows.- Experimental study of a turbulent boundary layer-shock wave interaction, using a monodimensional laser velocimeter.- Solution of diffuser inlet velocity field of radial impeller centrifugal turbine pumps by means of the LDA method.- Measurement of unstationary size-distribution of submicron droplets in rarefaction-wave condensation by laser scattering.- Investigation of initial stage of cavitation by diffraction optic method.- Optic and x-ray investigation of water fracture in rarefaction wave at later stages.- Experimental studies of stress waves in elastic plates with curved boundary.- Laser-doppler velocimetry applied to the impact testing of polymers.- Speckle photography of a turbulent density field.- Experimentally and theoretically generated isochromatic fringe loops of cracks propagating at a constant velocity.- Stresses and deformation pattern investigated by the Moire optical method in gears.- Photoelasticity studies of a new method of fracture toughness evaluation of high loading rates.- A new approach to evaluation of measurement in dynamic photoelasticity.- Optimization of a stiffener to stop a propagating crack.- Holographic interferometric study on propagation and focusing of underwater shock waves by microexplosions.- Flow visualization in the wake of three-dimensional bodies undergoing self-sustained oscillations.- Flow visualization of a shock wave by simple refraction of a background grid.- Flow visualization in steel casting.- Behaviour of the vortex layer generated in the flow by an impulse change of circulation around a profile.- Flow visualization of turbulent boundary layer on flat and cylindrical heated walls.- Investigation of transient phenomena in heat transfer.- Flow visualization in a steam turbine profile cascade using a colour schlieren method.- Colour schlieren method.- Photoelastic analysis of a seismoactive crack.- Study of flow of metal and stress conditions at rolling by means of optical methods.- Using interferometric measurements in caicuiation of aerodynamic forces.- Holographic interferometer to investigate deformations of mechanical and thermal stressed motorcar-cylinders.- A new application of differential interferometry for dynamic stress analysis.- Laser beam monitoring of shock waves.- Tomography of transient events.- Application of new photo-electric method to the measurement of dynamic stress intensity factor.- Experimental study of optical features of shock-heated jets.- An investigation of impulse jet outflowing from multi-nozzle blocks by means of the schlieren installation.- Karman vortex street in the supersonic wake a rough flat plate.- Migration of droplets under reduced gravity.- The methods for diagnosing velocity and temperature in the high-temperature gas flow.