Instantaneous CARS thermometry in turbulent flames

Fujii, Satoshi; Gomi, Mitsuo; Jin, Youngho

doi:10.1016/0010-2180(82)90130-4

Cited by 12 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding this, high data aquisition rates are favourable. However the pulse repetition rates for most of the standard CARS systems is determined by the commonly employed Nd : YAG laser (typically 10 or 20 Hz) [5][6][7][8]. In contrast, with an excimer-laserpumped CARS apparatus, much higher repetition rates can be achieved so that even for short time events a statistically sufficient number of data can be measured.…”

mentioning

confidence: 99%

High-speed N2-CARS thermometry

1989

View full text Add to dashboard Cite

Abstract.Using an excimer laser-pumped CARS spectrometer, single-pulse temperature measurements have been performed with a repetition rate of up to 80 Hz in a 3-dimensional, phase-matched geometry. Single-pulse temperature data measured in a furnace typically fluctuated by _+ 50 K within the temperature range 300-1300 K. The CARS spectra were analyzed by the G-matrix formalism with inclusion of cross coherence effects.

show abstract

mentioning

confidence: 99%

High-speed N2-CARS thermometry

1989

View full text Add to dashboard Cite

show abstract

“…Information about a single rotational/vibrational energy level is insufficient to determine the temperature of the volume so a number of different energy levels must be probed. This can be done by scanning the frequency of the Stokes beam or by generating Presented as Paper 90-5260 at the AIAA 2nd International Aerospace Planes Conference, Orlando, FL, Oct. 29-31, 1990; received Dec. 3,1990; revision received June 1,1992; accepted for publication June 3, 1992 a number of frequencies all at once. In the second approach called "broadband" CARS, a Stokes beams containing a band of wavelengths is created.…”

Section: Oherent Anti-stokes Raman Spectroscopy (Cars)mentioning

confidence: 99%

“…On the receiving side, the anti-Stokes beam partially overlapped the other pump beam. Since the blue anti-Stokes beam which contained the signal was very weak compared to the green pump beam, it was separated from the pump using a multipass dichroic cavity (as was done by Fujii et al 3 ). Each time the green and blue beams struck a cavity mirror 98% of the blue was reflected and 90% of the green was passed, thus separating the signal from the interference.…”

Section: A Optical Apparatusmentioning

confidence: 99%

Coherent anti-Stokes Raman spectroscopy temperature measurements in a hydrogen-fueled supersonic combustor

Smith

Jarrett

Antcliff

et al. 1993

Journal of Propulsion and Power

View full text Add to dashboard Cite

Coherent anti-Stokes Raman spectroscopy (CARS) thermometry has been used to obtain static temperature cross sections in a three-dimensional supersonic combustor flowfield. Data were obtained in three span wise planes downstream of a single normal fuel injector which was located downstream of a rearward-facing step. The freestream flow was nominally Mach 2 and was combustion heated to a total temperature of 1440 K (yielding a static temperature of about 800 K in the freestream) to simulate the inflow to a combustor operating at a flight Mach number of about 5.4. Since a broadband probe laser was used an instantaneous temperature sample was obtained with each laser shot at a repetition rate of 10 Hz. Thus root-mean-square (rms) temperatures and temperature probability density functions (pdf's) were obtained in addition to mean temperatures.

show abstract

Moderne Entwicklungen bei der Untersuchung von Verbrennungsvorgängen

Just¹

1983

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

Starker gekrummte Flammenfronten, d. h. rnit Krummungsradien, die in die GroBenordnung der Flarnmenzonendicke fallen, spielen u. a. in vielen technisch wichtigen Anwendungen eine Rolle. Nichtebene Flammenfronten konnen ausgeprlgt instationares Verhalten zeigen. StOrungen im anstromenden Gas kannen rnit der Flammenfront wechselwirken und zu besonderen Flammenoberfllchenformen fuhren, fur die in Abb. 6 und 7*) zwei Beispiele gegeben werden. Eine umfassende theoretische Beschreibung der beobachteten zahlreichen Instabilitltsformen steht noch aus, da sich die Diskussion der diese Phanomene beschreibenden, nichtlinearen Differential-bzw. Integralgleichungen als schwierig erweist. Fortschritte iiber die einfachen, linearisierten Ansatze verschiedener Autoren [7] sind in jiingerer Zeit von Sivashinski (81 et al. sowie von Clavin [9] et al. erzielt worden. *) Siehe Seite 972. Ber. Bunsenges. Phys. Chem. 87, 968-979 (1983) -0 Verlag Chemie GmbH, D-6940 Weinheim, 1983.

show abstract

Instantaneous CARS thermometry in turbulent flames

Cited by 12 publications

References 19 publications

High-speed N2-CARS thermometry

High-speed N2-CARS thermometry

Coherent anti-Stokes Raman spectroscopy temperature measurements in a hydrogen-fueled supersonic combustor

Moderne Entwicklungen bei der Untersuchung von Verbrennungsvorgängen

Contact Info

Product

Resources

About