Studies in premixed combustion. [Benjamin Levich Inst. for Physico-Chemical Hydrodynamics, City College of CUNY, New York, New York]
During the period under review, significant progress was been made in studying the intrinsic dynamics of premixed flames and the problems of flame-flow interaction. (1) A weakly nonlinear model for Bunsen burner stabilized flames was proposed and employed for the simulation of three-dimensional polyhedral flames -- one of the most graphic manifestations of thermal-diffusive instability in premixed combustion. (2) A high-precision large-scale numerical simulation of Bunsen burner tip structure was conducted. The results obtained supported the earlier conjecture that the tip opening observed in low Lewis number systems is a purely optical effect not involving either flame extinction or leakage of unburned fuel. (3) A one-dimensional model describing a reaction wave moving through a unidirectional periodic flow field is proposed and studied numerically. For long-wavelength fields the system exhibits a peculiar non-uniqueness of possible propagation regimes. The transition from one regime to another occurs in a manner of hysteresis.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- DOE Contract Number:
- Resource Type:
- Technical Report
- Research Org:
- City Coll. of New York, NY (United States). Levich Inst.
- Sponsoring Org:
- DOE; USDOE, Washington, DC (United States)
- Country of Publication:
- United States
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMBUSTION; RESEARCH PROGRAMS; BURNERS; FLAME PROPAGATION; FLAMES; LAMINAR FLOW; MATHEMATICAL MODELS; PROGRESS REPORT; CHEMICAL REACTIONS; DOCUMENT TYPES; FLUID FLOW; OXIDATION; THERMOCHEMICAL PROCESSES 400800* -- Combustion, Pyrolysis, & High-Temperature Chemistry
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