Mass flow rate effect on a rotating detonation combustor with an axial air injection

Sato, T.; Chacon, F.; Gamba, M.; Raman, V.

doi:10.1007/s00193-020-00984-7

Mass flow rate effect on a rotating detonation combustor with an axial air injection

Journal Article · Wed Feb 17 00:00:00 EST 2021 · Shock Waves

DOI:https://doi.org/10.1007/s00193-020-00984-7· OSTI ID:1808471

^[1]; ^[2]; ^[2]; Raman, V. ^[2]

Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan
Univ. of Michigan, Ann Arbor, MI (United States)

Changing the flow rate of reactants being injected into a rotating detonation combustor (RDC) results in interesting behavior of the system. Prior studies have found that an increase in mass flow rate gradually increases the detonation wave speed before splitting the wave into multiple fronts. Here, the focus of this study is in understanding the physics of such behavior through a combination of experiments and numerical simulations. For this purpose, the axial air inlet-based RDC geometry is used. In the experiments, the wave velocity increased similar to prior studies. Corresponding full-scale simulations show that increase in mass flow rate by increasing pressure of the feed plenums shortens the recovery time of the injectors. This causes a more uniform fuel–air mixture to form prior to the arrival of the detonation wave. As a result, a more ideal detonation is observed, which leads to an increased wave velocity. Details of the detonation structure and variation with mass flow rate are analyzed. The presence and variation of the different deflagration zones in such non-premixed RDCs are also discussed.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE)

Grant/Contract Number:: FE0025315

OSTI ID:: 1808471

Journal Information:: Shock Waves, Journal Name: Shock Waves Vol. 31; ISSN 0938-1287

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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