Evaporation and induced air flow in sprays produced by superheated water jets
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Evaporation and induced air flow in sprays produced by superheated water jets by H. S. Ostrowski

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Published .
Written in English


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Statementby H.S. Ostrowski.
ID Numbers
Open LibraryOL20746198M

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  Low leeside pressures are produced by the rarefaction of the gas, the acceleration of the drop, and the high tensions generated by rapid stretching of the stripped liquid. The droplet temperature may rise because of heat transfer from the hot gas to thin drop filaments, and by viscous heating due to rapid by: An experimental study has been made of a spray flash evaporation occurring in a superheated water jet injected through a circular nozzle into a low-pressure vapour zone. The effects of nozzle. Fig. 3a shows the vacuum spray flash evaporator which operates on the DTECD principle [].It is a single stage flash evaporation process comprised of a supply tank, the spray chamber (operated at P vac), a data acquisition system to log temperatures, shell and tube condenser for water evaporated in the spray chamber, a condensate tank, the cooling water tank connected to the condenser, and a Cited by: 2. The two-phase flow in a spray involves a number of complicated physical phenomena. One may identify four flow domains in a spray, where specific physical phenomena are governing the flow: 1. disintegration of a liquid sheet or jet into droplets; 2. dense spray region where interactions between the droplets are prevailing (e.g., coalescence); 3.

Pressures are those of the spray environment. Evaporation and combustion of sprays 5 distinction between a two-phase LHF model and a single-phase flow model involves the representation of thermodynamic properties such as temperature, density, enthalpy, etc. (the state relationships). In the developing air–water flow region, the air content is zero on the jet centreline and the velocity is the ideal-fluid flow velocity. The air diffusion layer and the momentum shear layer are developing, and there is some momentum transfer from the jet core to the surrounding liquid. The entrained bubbles are advected in regions of high shear stresses and they are broken up into bubbles of smaller sizes. Evaporation and condensation are amongst the most important industrial processes which are used primarily in chemical technology as well as other areas of contemporary technology and they have huge practical significance, just to mention perspective applications in removal of large heat fluxes in electronics and power engineering. Meters the flow of refrigerant entering the evaporator, reduces the boiling point to create a pressure/temperature drop The _____ relationship correlates the vapor pressure and the boiling point of water and is the basis for controlling the cooling system's temperatures. T/F The only location where the refrigerant vapor is superheated.

An experimental study was carried out to determine the efficiency of spray flash evaporationoccurring in a superheated water jet injected vertically downward through a simple tubular range of experimental variables include: superheats from to K, liquid flow rates from to kg/s, liquid temperatures from 40 to 80°C. 5. Air is compressed by an adiabatic compressor from kPa and 20oC to MPa and oC. Air enters the compressor through a m2 opening with a velocity of 30 m/s. It exits through a m2 opening. Calculate the mass flow rate of air and the required power input. Why does the air exit the compressor at a higher temperature? The evaporation from a water body is the result of two process: forced evaporation due to the flow of air across the water surface and free evaporation (evaporation to still air) caused by the density difference of moisture between the air just above the water surface and the surrounding air. Break-up of oil-in-water emulsion jets * Roylance, T F Pickering, S J Hay, N Thomas, G H A rotary cup air blast atomiser for molten slag-an investigation of particle size and spray trajectory Nagai, N Sato, K Lee, C W Atomisation characteristics of superheated liquid jets Session VIA: SPRAY STRUCTURE,TRANSFER PROCESSES AND COMBUSTION I