Dynamics and morphology of spherical diffusion flames under rotation

S. W. Yoo, S. Chaudhuri, K. R. Sacksteder, Peng Zhang, D. L. Zhu, C. K. Law

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Microgravity experiments were conducted in the 2.2-second drop tower and zero-gravity facility at NASA-GRC to gain fundamental understanding of the effects of spinning on an otherwise spherical diffusion flame. The flames were generated by injecting either a fuel or an oxidizer mixture from a porous burner to a controlled ambient of either an oxidizer or fuel mixture, respectively. Results show that the polar flame location scales with the angular velocity monotonically as ωawhere a is greater and smaller than unity for small and large spinning velocities, respectively. On the contrary, the equatorial flame location responds nonmonotonically to increasing spinning velocity: first increasing and then decreasing. The experimental observations agree well with the computational simulation where the simulated results demonstrate that the nonmonotonic response of the equatorial flame location is caused by dilution of the reactant concentration in the outwardly-directed radial flow by the product and inert that are carried by the inwardly-directed polar flow upon traversing the flame segment in the polar region.
Original languageEnglish
Title of host publication50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Publication statusPublished - 20 Jun 2012
Externally publishedYes
Event50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: 9 Jan 201212 Jan 2012

Conference

Conference50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityNashville, TN
Period9/01/1212/01/12

ASJC Scopus subject areas

  • Aerospace Engineering

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