Pomiary gęstego aerozolu oleju rzepakowego za pomocą fazowej anemometrii dopplerowskiej

• Autorzy: Bialkowski M. T. , Pekdemir T. , Brautsch M. , Towers D. P. , Elsbett G.

Warianty tytułu

EN

Phase Doppler anemometry measurements of a dense rapeseed oil spray

• Języki publikacji: PL

Abstrakty

PL

Strugi gęstego oleju rzepakowego (RSO) rozpylone pod wysokim ciśnieniem zostały przebadano metodą fazowej anemometrii dopplerowskiej (PDA). Próbki zimnego sprężonego oleju były wstępnie ogrzewane i wtryskiwane pod różnym ciśnieniem (56,3; 76,0; 93,8; 112,5; 131,3 MPa) do ośrodka o sześciu różnych gęstościach (3; 6; 15; 30; 45; 60 kg/m3). Duża gęstość RSO w istotnym stopniu oddziałuje na jakość pomiaru rozmiarów kropli i prowadzi do podobnych trudności na jakie napotkano podczas badań gęstego aerozolu oleju napędowego. Testy rozmiarów kropel wymagały analizy wpływu napięcia fotopowielacza (PMT) oraz warunków wtrysku na określenie wielkości kropli. Dla prowadzonych badań najodpowiedniejsza czułość PMT została określona przy 1000 V. Rozkład rozmiarów kropel wykazał, że wzrost ciśnienia otoczenia skutkuje deformacją Gaussowskiego rozkładu wymiarów kropli przez przyrost liczby kropel o małych wymiarach. Ponadto, wzrost zarówno ciśnienia wtrysku, jak i ciśnienia ośrodka powoduje zmniejszenie średniej średnicy kropli oraz wyraźny spadek liczby uwzględnianych kropel. Mimo trudności z zastosowaniem techniki PDA do badań aerozolu RSO można wysnuć wniosek, że metoda może być z powodzeniem stosowana, pod warunkiem odpowiedniego dostosowania parametrów PDA.

EN

High pressure, dense rapeseed oil (RSO) sprays have been investigated using a Phase Doppler Anemometry (PDA) setup. Samples of cold pressed RSO were pre-heated and injected at various pressures (56.3, 76.0, 93.8,112.5,131.3 MPa) and six different ambient densities (3,6,15,30,45,60 kg/m3). High density of RSO significantly affects the quality of sizing measurements, and leads to the similar experimental problems which have been found for the dense Diesel spray. The sizing tests involved analysis of the influence of the photomultiplier (PMT) voltage and injection conditions on droplet validation. The sensitivity of the PMT at 1000 V was found as the most appropriate in the performed tests. The droplet size distributions revealed that the increasing ambient pressure results in a deformed Gaussian drop size distribution having larger number of small droplets. Furthermore, the increasing injection and ambient pressures lower the mean droplet diameter but result in the significant decrease of the droplet validation. Despite the experimental difficulties of applying the PDA technique to RSO sprays it is concluded the method can be successfully used if the appropriate adjustment of PDA parameters is undertaken.

Słowa kluczowe

PL

struga rozpylonego oleju rzepakowego; gęsty aerozol; fazowa anemometria Dopplera

EN

rapeseed oil spray; dense spray; Phase Doppler Anemometry

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Silniki Spalinowe
• Rocznik: 2005
• Tom: R. 44, nr 4
• Strony: 41--50
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Bialkowski M. T.

• Szkoła Inżynierii i Fizyki, Uniwersytet Heriot--Watt, Edynburg, Szkocja

autor

Pekdemir T.

• Szkoła Inżynierii i Fizyki, Uniwersytet Heriot--Watt, Edynburg, Szkocja

autor

Brautsch M.

• Wydział Ochrony Środowiska, University of Applied Sciences, Amberg-Weiden, Niemcy

autor

Towers D. P.

• Szkoła Inżynierii i Fizyki, Uniwersytet Heriot--Watt, Edynburg, Szkocja

autor

Elsbett G.

• ELSBETT Technologie GmbH, Thalmassing, Niemcy

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