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Phase Doppler Anemometer for Measurements of Deterministic Spray Unsteadiness

Hardalupas, Y., Imperial College of Science, Technology and Medicine, Mechanical Engineering Department, London, UK, und Horender, S. (2001) Phase Doppler Anemometer for Measurements of Deterministic Spray Unsteadiness. Particle and Particle System Chracterization, 18, Seiten 205-215.

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Kurzfassung

A method and analysis was developed to quantify the amplitude of deterministic spray unsteadiness based on Phase Doppler Anemometry (PDA), which sampled timedependent droplet velocity and size measurements, in order to determine the fluctuations of droplet data rate and number density, which are quantities relevant to fluctuations of droplet concentration. The data processing method of the PDA measurements was assessed in a pulsed spray at a frequency of 20Hz injected in a swirl-stabilised burner. Comparisons between quantities relevant to droplet concentration fluctuations, measured by PDA and a light scattering technique, quantified the deterministic spray unsteadiness and agreed to within 15%. The developed PDA approach was applied in the swirl-stabilised burner to measure the amplitude of deterministic spray unsteadiness of an otherwise steady spray, which was caused by the instability of the atomisation process. The intensity of deterministic fluctuations of droplet data rate and number density, occurring at a frequency range around 600 Hz due to the atomisation process, was quantified to 15% of the corresponding mean value and this spray unsteadiness generated fluctuations on the air and droplet velocity fields. The deterministic spray unsteadiness could survive up to the end of the recirculation zone of the air flow at the burner exit and, therefore, could influence flame stability.

Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen: LIDO-Berichtsjahr=2003,
Titel:Phase Doppler Anemometer for Measurements of Deterministic Spray Unsteadiness
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hardalupas, Y., Imperial College of Science, Technology and Medicine, Mechanical Engineering Department, London, UK, NICHT SPEZIFIZIERT
Horender, S.NICHT SPEZIFIZIERT
Datum:2001
Erschienen in:Particle and Particle System Chracterization
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:18
Seitenbereich:Seiten 205-215
Status:veröffentlicht
Stichwörter:Phase Doppler Anemometer,
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Ilka Micknaus
Hinterlegt am:31 Jan 2006
Letzte Änderung:14 Jan 2010 19:20

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