Two-stage ejector based pressure recovery system for small scale SCOIL

Singhal, Gaurav; Rajesh, R.; Mainuddin,; Tyagi, Rakesh K.; Dawar, A. L.; Subbarao, P.M.V.; Endo, Masamori

doi:10.1016/j.expthermflusci.2005.09.002

Cited by 17 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For comparison, the PRS for a traditional COIL with a two-stage ejector in [16] had an ejection coefficient n = 0.001 (the large difference between these values is apparently related to non-optimal design of the PRS in [16]). Here, the following circumstances are noteworthy.…”

Section: Operation Of Active Diffuser In a Coil Prs With Discharge Ofmentioning

confidence: 98%

A pressure recovery system for chemical oxygen-iodine laser based on an active diffuser

Malkov¹,

Kiselev²,

Orlov³

et al. 2011

Thermophys. Aeromech.

View full text Add to dashboard Cite

An open-type pressure recovery system (PRS) for chemical oxygen-iodine laser was designed and fabricated. As a first stage, an active diffuser was used in which the ejecting gas supply was organized through nozzles disposed around the channel periphery. The second stage was a supersonic ejector. Numerical simulation data for the viscous turbulent flow with heat release through the diffuser gas-dynamic channel, and also data obtained by testing the active diffuser in operation on a model facility equipped with a vacuum chamber, are reported. The obtained data were used to develop a full-scale setup with exhaust of laser gas into the atmosphere; this has allowed us to optimize the performance characteristics of the setup and substantially improve its mass-dimensional characteristics. Special attention was paid to parameter matching and synchronization of laser start with the operation of PRS components.

show abstract

Section: Operation Of Active Diffuser In a Coil Prs With Discharge Ofmentioning

confidence: 98%

A pressure recovery system for chemical oxygen-iodine laser based on an active diffuser

Malkov¹,

Kiselev²,

Orlov³

et al. 2011

Thermophys. Aeromech.

View full text Add to dashboard Cite

show abstract

“…Thus the momentum of the mixed stream exhausted from the first stage is employed to propel the second entrained stream into the second stage ejector, consequently leading to a better performance over the conventional single stage ejector system [19,20]. Such a two-stage ejector-diffuser system (TSED) has been known to yield many advantages over the SSED system, such as the enhancement of the pressure recovery and the entrainment ratio of the ejector-diffuser system [21,22] Previous CFD works [9] performed on the TSED system have revealed details of the pressure ratio effects and geometrical effects on the ejector-diffuser flow fields. Inherent relations between choking phenomenon, vortices generation and pressure ratio are clearly mentioned.…”

Section: Introductionmentioning

confidence: 98%

Optimization study of a two-stage ejector–diffuser system

Kong

Kim

2016

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…Results revealed the increase in pressure recovery ratio over the conventional SSED system. Singhal et al [6,17] installed a two-stage ejector for the case of dissimilar primary and entrained fluids for the application of chemical lasers, which requires extremely high pressure ratio of the ejector and high vacuum level of the entrained flow chamber. However in the practical situation of a mixing-based ejector, the entrained stream is usually open to the atmosphere thus it can be freely propelled by the primary stream.…”

Section: Introductionmentioning

confidence: 99%