Project detail

Experimental Investigation of Effervescent Injector Spray Instability

Duration: 01.01.2003 — 31.12.2005

Funding resources

Czech Science Foundation - Postdoktorandské granty

- part funder (2003-01-01 - 2005-12-31)

On the project

Návrh metodiky měření nestabilit spreje v effervescent tryskách

Description in English
In some technical applications (e.g. fuel atomisation in gas turbine combustors or burners), new type of injectors called effervescent atomizers are more frequently being used. Effervescent atomisation is a method of twin-fluid atomisation that involvesbubbling a small amount of gas into the liquid before it is ejected from the atomizer. The advantages in comparison with common twin-fluid injectors are simple design and fine spray under low pressure and low mass air-liquid ratio. Nevertheless unstablebehaviour of atomizer occurs at some operational modes. Little effort has been so far done to resolve this problem. The objective of the submitted project is to design a suitable method for measurement of spray instabilities. Two techniques will be used.The first one is based on fast miniature pressure sensor placed close to nozzle orifice. Time record of the signal after FFT will be statistically analysed. The result will be quantitative information on global instability. The other technique employs

Mark

GP101/03/P020

Default language

Czech

People responsible

Jedelský Jan, prof. Ing., Ph.D. - principal person responsible

Units

Energy Institute
- (2003-01-01 - 2005-12-31)

Results

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Discharge coefficient and operational flow characteristics of multihole effervescent atomizer. In 9th International Conference on Liquid Atomization and Spray Systems - ICLASS 2003. Sorrento, Italy: Illas Europe, 2003. p. 0310 ( p.)ISBN: 88-88104-03-8.
Detail

JEDELSKÝ, J.; JÍCHA, M. Unsteadiness in Effervescent Sprays: a New Evaluation Method and the Influence of Operational Conditions. Atomization and sprays, 2008, vol. 18, no. 1, p. 49-83. ISSN: 1044-5110.
Detail

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Characterization of Instabilities of Sprays Generated by Multihole Effervescent Atomizers. In 9th International Conference on Liquid Atomization and Spray Systems - ICLASS 2003. Sorrento, Italy: Illas Europe, 2003. p. p7 ( p.)ISBN: 88-88104-03-8.
Detail

SLÁMA, J.; JÍCHA, M.; JEDELSKÝ, J. Development of low emission monoblock burner: Atomization and combustion of liquid fuels. In Aplikácia experimentálnych a numerických metód v mechanike tekutín. Žilina: Žilinská universita v Žiline v EDIS-vydavatelstve ŽU, 2004. p. 115 ( p.)ISBN: 80-8070-234-9.
Detail

JEDELSKÝ, J.; JÍCHA, M. Research of a Two-Phase Flow Instabilities of an Effervescent Atomizers. In Aplikácia experimentálnych a numerických metód v mechanike tekutín. Žilina: Žilinská universita v Žiline v EDIS-vydavatelstve ŽU, 2004. p. 115 ( p.)ISBN: 80-8070-234-9.
Detail

SLÁMA, J. Vývoj nízkoemisního monoblokového hořáku: Atomizace a spalování kapalných paliv. In Konference Kotle, energetická zařízení. Brno: Brno, 2004. s. 1 ( s.)
Detail

SLÁMA, J.; JÍCHA, M.; JEDELSKÝ, J. Vývoj nízkoemisního monoblokového hořáku: Atomizace a spalování kapalných paliv. In Sborník přednášek z XIII. Konference Kotle a energetická zařízení. Brno: VUT Brno, 2004. s. 161 ( s.)ISBN: 80-214-2576-8.
Detail

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Characteristics and behaviour of multi-hole effervescent atomizers. In 19th ILASS Europe 2004. Nottingham: University of Nottingham, 2004. p. 521 ( p.)
Detail

JEDELSKÝ, J.; JÍCHA, M. Characteristics of a Two-phase Flow Inside the Mixing Chamber of an Effervescent Atomizer. In Two-Phase Flow Modelling and Experimentation 2004. Pisa: University of Pisa, 2004. p. 1 ( p.)ISBN: 88-467-1075-4.
Detail

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Vývoj trysky typu Effervescent pro nízkoemisní monoblokový hořák. In Energetika a životní prostředí 2004. Ostrava: VŠB Ostrava, 2004. s. 227 ( s.)ISBN: 80-248-0695-9.
Detail

OTÁHAL, J., JEDELSKÝ, J., JÍCHA, M. Specifika dvoufázového toku effervescent trysek. In Colloquium Fluid dynamics 2004. Praha: Institute of Termomechanics AS CR, 2004. s. 133 ( s.)ISBN: 80-85918-89-7.
Detail

OTÁHAL, J.; JEDELSKÝ, J.; JÍCHA, M. Specifika dvoufázového toku effervescent trysek. In Colloquium Fluid dynamics 2004. Praha: Institute of Termomechanics AS CR, 2004. s. 133 ( s.)ISBN: 80-85918-89-7.
Detail

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Characteristics of spray generated by effervescent atomizer. In 18. Sympozium o anemometrii, Úvaly u Prahy. Praha, Česká republika: Institute of Hydrodynamics AVCR, 2003. p. 47 ( p.)ISBN: 80-239-0644-5.
Detail

JEDELSKÝ, J.; JÍCHA, M. Unsteadiness of Effervescent Atomizer generated sprays. In Proceedings 20th Annual Conference on Liquid Atomization and Spray Systems. Orleans, France: Laboratoire de Combustion et Systemes Reactifs, CNRS Orleans, 2005. p. 253 ( p.)
Detail

STANSFIELD, P. – WIGLEY, G. - PITCHER, G. - NUGLISH, H. - JEDELSKY, J. Investigation into Primary Break Up of Conical Liquid Sheets Produced by a Pressure Swirl Gasoline Direct Injector. In Proceedings 20th Annual Conference on Liquid Atomization and Spray Systems. Orleans, France: Laboratoire de Combustion et Systemes Reactifs, CNRS Orleans, 2005. p. 329 ( p.)
Detail

JEDELSKÝ, J.; JÍCHA, M. Kvantifikace nestabilit spreje effervescent trysky s využitím PDPA techniky. In proceedings 19th Symposium on anemometry. Holany-Litice: Institute of Hydrodynamics ASCR, 2005. s. 59 ( s.)ISBN: 80-239-4871-7.
Detail

JEDELSKÝ, J.; OTÁHAL, J.; JÍCHA, M. Dvoufázový tok uvnitř effervescent trysky, vliv provozního režimu na stabilitu. In Setkání kateder hydromechaniky a termomechaniky. Blansko: Vysoké učení technické v Brně, 2005. s. 30 ( s.)
Detail

OTÁHAL, J.; JEDELSKÝ, J.; JÍCHA, M. Porovnání obrazů proudění dvoufázového toku a kvality generovaného spreje. In Proceedings Colloquium fluid dynamics 2005. Praha: 2005. s. 105 ( s.)ISBN: 80-85918-94-3.
Detail

JEDELSKÝ, J.; JÍCHA, M. Unsteadiness in Effervescent Sprays, A Comparison of Two Measurement Methods and the Influence of Operation Conditions. In Proceedings of International Symposium on Heat and Mass Transfer in Spray Systems. Ankara, Turkey: International Centre for Heat and Mass Transfer, 2005. p. 55 ( p.)ISBN: 1-56700-223-4.
Detail

JEDELSKÝ, J.; JÍCHA, M. Effervescent atomizer - temporal and spatial variations of spray structure. In Proceedings 10th International Congress on Liquid Atomization and Spray Systems ICLASS-2006. 1. Kyoto.,Japan: Institute for Liquid Atomization and Spray Systems - Japan, 2006. p. 1-8. ISBN: 4-9902774-1-4.
Detail

JEDELSKÝ, J.; JÍCHA, M. Unsteadiness in Effervescent Sprays - Measurement and Evaluation Using Combined PIV - PLIF Tecnique. In 20th Symposium on anemometry. 1. Holany - Litice, Česká republika: Institute of Hydrodynamics ASCR, 2006. p. 43-52. ISBN: 80-239-7144-1.
Detail

JEDELSKÝ, J.; JÍCHA, M. Unsteadiness in Effervescent Sprays - Measurement and Evaluation using Combined PIV-PLIF Technique. In Proceedings of 13th International Symposium on Applications of Laser Techniques to Fluid Mechanics. 1. Lisbon, Portugal: Calouste Gubelkian foundation, Lisbon, Portugal, 2006. p. 1-10.
Detail

JEDELSKÝ, J.; JÍCHA, M.; SLÁMA, J. Characterization of spray generated by multihole effervescent atomizer and comparison with standard Y-jet atomizer. In 9th International Conference on Liquid Atomization and Spray Systems - ICLASS 2003. Sorrento, Italy: Illas Europe, 2003. p. 0311 ( p.)ISBN: 88-88104-03-8.
Detail

Responsibility: Jedelský Jan, prof. Ing., Ph.D.