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Title: A small porous-plug burner for studies of combustion chemistry and soot formation

Authors:
 [1];  [1];  [2];  [1]; ORCiD logo [3];  [4];  [1];  [1]
  1. Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
  2. Holthuis and Associates, Sebastopol, California 95473, USA
  3. Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA, Department of Aerodynamics Wind Energy Flight Performance and Propulsion, Delft University of Technology, Delft, The Netherlands
  4. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1412003
Grant/Contract Number:
AC02-05CH11231; NA0003525; SC0002619
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 88; Journal Issue: 12; Related Information: CHORUS Timestamp: 2017-12-08 12:02:38; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Campbell, M. F., Schrader, P. E., Catalano, A. L., Johansson, K. O., Bohlin, G. A., Richards-Henderson, N. K., Kliewer, C. J., and Michelsen, H. A.. A small porous-plug burner for studies of combustion chemistry and soot formation. United States: N. p., 2017. Web. doi:10.1063/1.5016212.
Campbell, M. F., Schrader, P. E., Catalano, A. L., Johansson, K. O., Bohlin, G. A., Richards-Henderson, N. K., Kliewer, C. J., & Michelsen, H. A.. A small porous-plug burner for studies of combustion chemistry and soot formation. United States. doi:10.1063/1.5016212.
Campbell, M. F., Schrader, P. E., Catalano, A. L., Johansson, K. O., Bohlin, G. A., Richards-Henderson, N. K., Kliewer, C. J., and Michelsen, H. A.. 2017. "A small porous-plug burner for studies of combustion chemistry and soot formation". United States. doi:10.1063/1.5016212.
@article{osti_1412003,
title = {A small porous-plug burner for studies of combustion chemistry and soot formation},
author = {Campbell, M. F. and Schrader, P. E. and Catalano, A. L. and Johansson, K. O. and Bohlin, G. A. and Richards-Henderson, N. K. and Kliewer, C. J. and Michelsen, H. A.},
abstractNote = {},
doi = {10.1063/1.5016212},
journal = {Review of Scientific Instruments},
number = 12,
volume = 88,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on December 8, 2018
Publisher's Accepted Manuscript

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  • This article investigates the method of filtering the combustion products using soot samplers, convenient for local measurements in a flow and for studying the kinetics of the process. Explains that the amount of soot settling on the detachable tube and filter was determined by weighing on a WA-34 analytic balance and by burning out the soot in an oxygen stream at 900 C followed by analysis of the amount of CO/sub 2/ on a N-503 chromatograph. Concludes that the data presented indicate the effectiveness of the experimental procedure developed, providing broad possibilities for studying the characteristics of soot formation inmore » flames of homogeneous fuel-air mixtures at high pressures.« less
  • The linear stability of a premixed flame attached to a porous plug burner, using activaton energy asymptotics, is examined. Limit function-expansions are not an appropriate mathematical framework for this problem, and are avoided. A dispersion relation is obtained which defines the stability boundaries in the wave-, Lewis-number plane, and the movement of these boundaries is followed as the mass flux is reduced below the adiabatic value and the flame moves towards the burner from infinity. Cellular instability is suppressed by the burner, but the pulsating instability usually associated with Lewis numbers greater than 1 is, at first, enhanced. For somemore » parameter values the flame is never stable for all wavenumbers the Lewis number stability band that exists for the unbounded flame disappears. For sufficiently small values of the stand-off distance the pulsating instability is suppressed. 9 references.« less
  • In recent studies of edge-flames it was found that when the characteristic gas velocity exceeds a critical value the flame often undergoes spontaneous oscillations. The oscillations are amplified as the flow rate increases, reaching a maximum amplitude, and then decrease with further increasing flow rate until the flame restabilizes. In this paper we examine the concept of flame restabilization in a simpler but related problem - the planar premixed flame on a porous-plug burner - which is amenable to a full stability analysis. We show the dependence of all possible steady states on the relevant parameters, including the mass flowmore » rate, the effective Lewis number of the mixture, the overall activation energy of the chemical reaction, and the extent of heat release. A linear stability analysis is then carried out to examine whether these steady states are stable to small disturbances. The analysis determines the critical conditions for the onset of instability, as well as the nature of the instability. In particular, we show that by decreasing the mass flow rate, the flame, which is at first stable, starts to oscillate back and forth for a limited range of gas velocities but is then restabilized by further decreasing the mass flow rate. We also show that the properties of the plug, such as the thickness of the plate and its porosity, play a significant role in flame stabilization. (author)« less
  • The first observations were made of a new state of the C/sub 2/ radical via (2 + 2) resonance-enhanced multiple-photon ionization spectroscopy. The first laser-based observations of the HCO radical in a flame environment are reported. 27 refs., 12 figs. (DLC)
  • The purpose of this research program has been the performance of mass resolved resonance enhanced multiphoton ionization (REMPI) spectroscopy on species of importance in combustion with primary emphasis on the REMPI detection of photolytically produced C/sub 2/H. A molecular beam, flash photolysis apparatus equipped with a time-of-flight mass spectrometer was constructed for the production and monitoring of REMPI ions. New electronic states of C/sub 2/ and HCO have been discovered with rotationally resolved REMPI spectroscopy. A weak, diffuse REMPI spectrum near 276 nm has been observed and tentatively assigned to the C/sub 2/H radical. No other REMPI spectral features attributablemore » to C/sub 2/H were observed. 34 refs., 10 figs., 1 tab.« less