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Comparison of spray quality for two different flow configurations: Central liquid jet versus annular liquid sheet

Wachter, Simon; Jakobs, Tobias; Kolb, Thomas

Abstract (englisch):
The research work of the present study is focused on the detailed comparison of two external mixing twin fluid nozzle concepts: (i) a central liquid jet with annular gas stream, (ii) an annular liquid sheet with central gas jet. Both nozzle types are applied in high pressure entrained flow gasifiers (EFG), where atomization is characterized by low Gas-to-liquid ratio (GLR) and high fuel viscosity. In order to compare spray formation as well as atomization efficiency in terms of Sauter mean diameter, a nozzle with equal orifice area of the gas and liquid exit is investigated. The nozzle enables equal atomization conditions concerning GLR, liquid mass flow, velocity of liquid and gas, as well as momentum flow ratio for both nozzle configurations. 4 Newtonian liquids: water and three glycerol/water mixtures with viscosity of 1mPas, 50mPas, 100mPas and 200mPas are used for the experiments in both nozzle configurations at various GLR. For spray analysis, a high speed camera, a shadowgraphy system as well as a phase-doppler analyzer are applied. The use of three different measuring techniques allows for characterization of primary breakup as well as local drop size distribution. ... mehr

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Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Institut für Technische Chemie (ITC)
Publikationstyp Proceedingsbeitrag
Jahr 2019
Sprache Englisch
Identifikator KITopen-ID: 1000098689
HGF-Programm 34.14.02 (POF III, LK 01)
Erschienen in 29th European Conference on Liquid Atomization and Spray Systems, Paris, 2-4 Sep 2019
Veranstaltung 29th European Conference Liquid Atomization and Spray Systems (ILASS 2019), Paris, Frankreich, 02.09.2019 – 04.09.2019
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