Experimental Study of Rotating Detonation Combustor Performance under Preheat and Back Pressure Operation

Scaling Analysis and Experimental Investigation of a Rotating Detonation Engine

“…Injection schemes are classified as either premixed or non-premixed. The Rotating Detonation Combustor (RDC) at NETL operates on non-premixed injection [15]. Disagreement with premixed versus non-pre-mixed largely revolve around the concern of flashback in a pre-mixed combustor, a phenomenon during which the upstream reactants are ignited, threatening the integrity of upstream components [18].…”

“…In 2017, Roy, et al [15] performed preliminary research on the LSRDE. By investigating equivalence ratio, air supply, fuel supply, air pre-heat, and exhaust back pressure effects on system stability, operational regimes and instabilities could be analyzed.…”

“…Since testing for these studies [15,25] was completed, the LSRDE underwent alterations to enable similar studies with a larger detonation channel. The channel width was increased from 5.1 mm to 7.6 mm.…”

“…In the LSRDE, the increased air supply flow rate is strongly tied to the intensity of the detonation event. Increased air supply impacts mixedness and local equivalence ratio, both of which have been shown to impact detonation strength in the form of mode-switching and wave bifurcation [15,16]. It may be that increased supply flow rates increase mixing and therefore increase detonation strength by inducing more complete detonation, which in turn generates more backflow.…”

“…Transverse operation is an example of an unstable mode.Stable modes are differentiated from unstable modes by analyzing the periodicity of the system and the completeness of the combustion reaction. Generally, the LSRDE at NETL operates in a 2wave, stable mode[15].…”