Influence of Actively Controlled Heat Release Timing on the Performance and Operational Characteristics of a Rotary Valve, Acoustically Resonant Pulse Combustor

A Preliminary Investigation of the Secondary Flame and Operational Properties of an Actively-valved Pulse Jet

“…Based on the inlet valve geometry, pulse combustors are usually classified into two categories, namely valveless [10,11] and valved [12,13]. Recently, Lisanti and Roberts [6,14,15] developed a novel actively valved pulse combustor with rotary valve for pressure gain combustion applications. The low mass passive valve was replaced with a ball shaped rotary valve allowing for much more durable operation.…”

“…The performance and operational characteristics have been investigated with three operation modes identified and the resonant operation property quantified. The influence of heat release timing on the performance and operational characteristics has been further examined experimentally and numerically [15]. With the results, a general concept of the operational properties of the actively valved pulse combustor with gaseous fuel were understood.…”

“…With the results, a general concept of the operational properties of the actively valved pulse combustor with gaseous fuel were understood. In the previous work [6,14,15] all of the data collection was focused on a single axial location so that the variation along the axial location and the global sense of the combustion/acoustic coupling have not been elucidated. However, the combustion information in the downstream of the combustor shows an identical influence in governing the operational performance of the combustor.…”

Stability Characteristics of an Actively Valved Resonant Pulse Combustor

“…An actively valved RPC [45,46] has recently been developed by this group; it features an activelydriven rotary ball valve that replaces conventional reeds, or flappers, used as valves in passively valved RPCs. This ball-type RPC minimizes the difficulty in producing a robust design and makes it possible to maintain operational duration on the order of days, which could easily be extended with future design optimization.…”

“…This ball-type RPC minimizes the difficulty in producing a robust design and makes it possible to maintain operational duration on the order of days, which could easily be extended with future design optimization. Although the authors have performed studies to investigate the general performance of the newly designed RPC [45,46], its fundamentals are not yet fully understood.…”