..., this model ensures the best agreement with experimental data [ 6 – 8 ]. The perfect gas model was assumed at the steady-state flow, and the energy equation covers viscous work. The sealing channel domain, comprising the inlet area, the cavity in between the fins, and the outlet area, was discretized...

... on the flow in the upstream cavities. With the limited data available, it is not possible to consider all these effects, and for simplicity, it is assumed here that the heat transfer depends on the resultant velocity, U, where (3.11) U = W 2 + Ω a 2 For horizontal...

... resolved turbulent kinetic energy and the modeled turbulent kinetic energy k of the SAS turbulence model. It is clear that the effectiveness of such turbulence treatment is highly variable, mostly with the radius, showing a lower part of the cavity (nozzle jets area) where ξ  < 0.2. On the contrary...

... Wisler. 10 07 2017 31 08 2017 Cavities Experimental Turbines The gas turbine is a combustion engine that can convert natural gas or other liquid fuels to mechanical energy. This energy can be used to drive a generator that produces electrical energy, or form the core...

... and protect vulnerable components from the hot gases which would otherwise be entrained into disk cavities through clearances between rotating and static disks. Rim seals are fitted at the periphery of these disks to minimize purge. The mixing between the efflux of purge (or egress) and the mainstream gases...

...Rachel A. Berg; C. S. Tan; Zhongman Ding; Gregory Laskowski; Pepe Palafox; Rinaldo Miorini Fast response pressure data acquired in a high-speed 1.5-stage turbine hot gas ingestion rig (HGIR) show the existence of pressure oscillation modes in the rim-seal-wheelspace cavity of a high pressure gas...

... levels of cavity seal effectiveness. Unlike the double lip seal, the single lip seal is sensitive to overall Reynolds number, the addition of a simulated blade pressure field, and large-scale nonuniform ingestion. In the case of both seals, unsteady pressure variations attributed to shear layer...

...P. K. Ezhil Kumar; D. P. Mishra Trapped vortex combustor (TVC) is a relatively new concept, having potential application in gas turbine engines. In this work, an attempt has been made to characterize the 2D twin cavity TVC experimentally in terms of its visible flame length, pollutant emission...

... and to minimize the engine specific fuel consumption. To prevent overheating of the materials and thus the reduction of component life, an internal flow system is required to cool and protect the critical engine parts. Previous studies have shown that the insertion of a deflector plate in turbine cavities leads...

...Richard J. Jefferson-Loveday A new modeling approach has been developed that explicitly accounts for expected turbulent eddy length scales in cavity zones. It uses a hybrid approach with Poisson and Hamilton–Jacobi differential equations. These are used to set turbulent length scales to sensible...

..., the ADDTN starting problem has been studied by steady and unsteady numerical simulations. The effects of nozzle geometric parameters on internal nozzle performance have been discussed in detail, including cavity divergence angle, cavity convergence angle, cavity length, expansion ratio, rounding radius...

... well cavity rig, due to the interaction of cooling air supply with the main annulus. Previous work based on the same rig showed difficulties in matching predictions to thermocouple measurements near the rim seal gap. In this investigation, two different types of turbine stator well geometries were...

... URBINES AND P OWER . Manuscript received June 28, 2016; final manuscript received July 28, 2016; published online October 11, 2016. Editor: David Wisler. 28 06 2016 28 07 2016 Cavities Computational fluid dynamics Experimental Internal flow The gas turbine secondary air...

... by the Heat Transfer Committee of ASME for publication in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received June 29, 2016; final manuscript received June 30, 2016; published online August 23, 2016. Editor: David Wisler. 29 06 2016 30 06 2016 Cavities...

... for an axial-clearance and radial-clearance seal, Bohn et al. [ 37 ] (Re ϕ  = 2.4 × 10 6 , C F  = 0.46, G c  = 0.03) (The authors of this review suggest that these LSSs could be related to similar structures that have been observed in buoyancy-induced flow in rotating cavities. The circumferential...

...Dongdong Liu; Zhi Tao; Xiang Luo; Hongwei Wu; Xiao Yu This article presents a further investigation on the mechanism of hot gas ingestion by exploring the ingress with complicated cavity generated by the rotor-mounted cylinder protrusion. During the experiment, a cavity with 32 cylinder protrusions...

...Zixiang Sun; Dario Amirante; John W. Chew; Nicholas J. Hills Flow and heat transfer in an aero-engine compressor disk cavity with radial inflow has been studied using computational fluid dynamics (CFD), large eddy simulation (LES), and coupled fluid/solid modeling. Standalone CFD investigations...

..., 2015; published online June 9, 2015. Assoc. Editor: Jerzy T. Sawicki. 10 06 2014 30 04 2015 Bubble growth Cavities Computational fluid dynamics Film Heat transfer Hydrodynamic journal bearings are widely used in steam turbines and gas turbines. The performance...