Effects of Ambient Gas Density on the Structure of Pressure-atomized Sprays
نویسندگان
چکیده
A theoretical and experimental study of the dense-spray region of pressure-atomized nonevaporating sprays is described, emphasizing effects of ambient gas density in the atomization breakup regime. Mean liquid volume fraction distributions were measured for 9.5 mm diameter water jets in still air at pressures of 1-8 atm. Mixing was strongly affected by the gaslliquid density ratio and the degree of flow development at the jet exit, with the largest gadliquid density ratio and fully-developed turbulent pipe flow yielding the fastest mixing rates. Predictions based on the locally homogeneous flow approximation, where relative velocities between the phases are assumed to be small in comparison to mean flow ve!ocities, were in good agreement with measurements, including representation of effects of gashiquid density ratio and flow development at the jet exit.
منابع مشابه
Continuous-phase Properties of the Near-injector Region of Non- Evaporating Pressure-atomized Sprays
متن کامل
GDL construction effects on distribution of reactants and electrical current density in PEMFC
In this article, a two dimensional pore scale model of polymeric fuel cell, which is promising of a clean and renewable energy production, is presented here. Let reactive gases behave as an ideal gas; inhomogeneous anisotropic structure of the gas diffusion layer, is contemplated as a random generated circular porous media. Lattice Boltzmann method is applied to inquire the fluid flow and mass ...
متن کاملSynthesis and Seeding Time Effect on the Inter-Crystalline Structure of Hydroxy-Sodalite Zeolite Membranes by Single Gas (H2 and N2) Permeation
Microporous hydroxy-sodalite zeolite membranes with different morphologies were synthesized via secondary growth technique with vacuum seeding on tubular α-Al2O3 supports at two different synthesis conditions (i.e. two different routes). Microstructures of the synthesized membranes were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and si...
متن کاملA High-Pressure Droplet Model for Spray Simulations
Droplet vaporization models that are currently employed in simulating sprays are based on a quasisteady, low-pressure formulation. These models do not adequately represent many high-pressure effects, such as nonideal gas behavior, solubility of gases into liquid, pressure dependence of gasand liquid-phase thermophysical properties, and transient liquid transport in the droplet interior. In the ...
متن کامل