Detail publikace
EXPERIMENTÁLNÍ STUDIE NĚKTERÝCH ASPEKTŮ SPREJŮ TYPU „EFFERVESCENT“
JEDELSKÝ, J.
Český název
EXPERIMENTÁLNÍ STUDIE NĚKTERÝCH ASPEKTŮ SPREJŮ TYPU „EFFERVESCENT“
Anglický název
Some Aspects of Effervescent Atomization: Experimental Study
Typ
habilitační práce
Jazyk
en
Originální abstrakt
The present work is focused on experimental study of a single-hole, plain-orifice effervescent atomizer with an outside-in gas injection configuration for combustion applications. Introductory chapter outlines main features of the effervescent atomization. Next chapter deals with two-phase flow inside the atomizer. Qualitative description of fluid mixing, internal two-phase transport and discharge of the mixture is based on published maps, analytical two-phase flow models are used for predictions of discharge of the gas-liquid mixture and compared with experimental data. Phenomenological explanation of liquid break-up and spray-gas interaction is followed with experimental description of the spray structure using Particle Image Velocimetry-Planar Laser-Induced Fluorescence technique; spatially and temporally resolved distributions of the liquid within the spray and spray cone angles are studied with respect to operation conditions of the atomizer. Spatial variation of droplet characteristics, such size and velocity distributions, are probed by means of Phase-Doppler Anemometry. Energy considerations in effervescent atomization are followed with an estimation of atomization efficiency. The last chapter describes several applications of the effervescent atomizer for waste fuel and suspension spraying.
Český abstrakt
Předložená práce systematicky shrnuje poznatky získané při experimentálním výzkumu atomizace typu effervescent. Věnuje se těmto aspektům: vnitřní dvoufázové proudění, vlastnosti spreje (velikost a rychlost kapek, hmotnostní toky ve spreji atd.), atomizační účinnost, nestability, atomizace suspenzí, návrhy trysek pro různé aplikace atd.
Anglický abstrakt
The present work is focused on experimental study of a single-hole, plain-orifice effervescent atomizer with an outside-in gas injection configuration for combustion applications. Introductory chapter outlines main features of the effervescent atomization. Next chapter deals with two-phase flow inside the atomizer. Qualitative description of fluid mixing, internal two-phase transport and discharge of the mixture is based on published maps, analytical two-phase flow models are used for predictions of discharge of the gas-liquid mixture and compared with experimental data. Phenomenological explanation of liquid break-up and spray-gas interaction is followed with experimental description of the spray structure using Particle Image Velocimetry-Planar Laser-Induced Fluorescence technique; spatially and temporally resolved distributions of the liquid within the spray and spray cone angles are studied with respect to operation conditions of the atomizer. Spatial variation of droplet characteristics, such size and velocity distributions, are probed by means of Phase-Doppler Anemometry. Energy considerations in effervescent atomization are followed with an estimation of atomization efficiency. The last chapter describes several applications of the effervescent atomizer for waste fuel and suspension spraying.
Klíčová slova česky
dvoufázové proudění, effervescent atomizace, vlastnosti spreje, suspenze, směs kapalina–plyn, atomizační účinnost
Klíčová slova anglicky
two-phase flow, effervescent atomization, spray characteristics, suspensions, gas–liquid mixture, atomization efficiency
Vydáno
29.03.2013
Nakladatel
VUT Brno
Místo
Brno
Strany od–do
1–92
Počet stran
92