The present paper discusses film cooling behavior through numerical simulation in the presence of a twisted tape insert inside hole. imparts swirl to coolant flow. Coolant intensity is controlled by varying pitch resulting numbers 0.0289, 0.116, and 0.168. performance evaluated using area-averaged effectiveness heat transfer coefficient for blowing ratios 0.5, 1.0, 1.5, 2.0. Results revealed si...

Recent experiments conducted in the Rotor Force Test Facility at the California Institute of Technology have examined the effects of a tip leakage restriction and swirl brakes on the rotordynamic forces due to leakage flows on arl impeller undergoing a prescribed circular whirl. The experiments simulate the leakage flow conditions and geometry of the Alternate Turbopump Design (ATE)) of the Spa...

Abstract Lunar swirls are recognized as broad, bright albedo features in various regions of the Moon. These often separated by dark off-swirl lanes or terminate against background, such lunar maria. Prior mapping has been done primarily contrast, which is prone to subjectivity. Closer examination on-swirl areas shows that they not uniform, making boundary between on- and difficult map with cert...

Controlling the flame shape and its liftoff height is one of main issues for oxy-flames to limit heat transfer solid components injector. An extensive experimental study carried out analyze effects co- counter-swirl on flow patterns non-premixed stabilized above a coaxial injector when both inner fuel annular oxidizer streams are swirled. A swirl level greater than 0.6 in stream shown yield com...

Demand control of the air distribution systems is crucial to satisfactory thermal environment under variable heat gain conditions in an energy efficient manner. In this study, airflow patterns, ventilation performance and local comfort have been experimentally investigated mock-up meeting office rooms with a volume (VAV) system. The Active Diffuser, which had constant inlet velocity, was compar...

Abstract Boundary layer ingestion (BLI) offers potential reductions in fuel burn and emissions. The propulsive fuselage concept features an aft fan that ingests the 360 deg boundary layer. A critical condition for this configuration occurs when a sideslip angle arises between aircraft longitudinal axis freestream velocity. flow combination with airframe generates inlet distortion depends on dir...

a computational optimization was performed for a direct-injection diesel engine using three-dimensional modeling. fully transient cfd analyses of different valve profile strategies for the intake and compression strokes were performed to evaluate the effects on both engine performance and in-cylinder flow-field evolution. the turbulence model was used along with the second order linear upwind s...

Recommended Citation Emadi, Majid. "Flame structure and thermo-acoustic coupling for the low swirl burner for elevated pressure and syngas conditions. ABSTRACT Reduction of the pollutant emissions is a challenge for the gas turbine industry. A solution to this problem is to employ the low swirl burner which can operate at lower equivalence ratios than a conventional swirl burner. However, flame...