.... 25 06 2018 29 06 2018 Aerodynamics Aerospace applications Cavities Computational fluid dynamics Design optimization Experimental Labyrinth seals are the most popular and the oldest sealing solution in turbomachinery. They are used both in gas and steam turbines...

.... 07 06 2017 21 10 2017 Aerospace applications Cavities Gas turbine technology Heat transfer Internal flow Figure 1 from Ref. [ 1 ] shows a high-pressure compressor rotor where cooling air flows axially through the clearance between the bores of the compressor disks...

.... [16] Gupta , K. , Ramerth , D. , and Ramachandran , D. , 2008 , “ Numerical Simulation of TOBI Flow—Analysis of the Cavity Between a Seal-Plate and HPT Disk With Pumping Vanes ,” ASME Paper No. GT2008-50739. 10.1115/GT2008-50739 [17] Benim , A. C. , Cagan , M. , Bonhoff...

... Alternatives for Predicting Re-ingestion in Turbine Disc Rim Cavities,” ASME Paper No. GT2012-68592. 10.1115/GT2012-68592 [14] Clark , K. , Barringer , M. , and Thole , K. , 2016 , “Using a Tracer Gas to Quantify Sealing Effectiveness for Engine Realistic Rim Seals,” ASME Paper No. GT2016...

... 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 Also shown in Fig. 6...

... Cavities Experimental Turbines The gas turbine is used widely to power aero-engines and to generate electricity. Increasing fuel costs and demanding environmental legislation have driven engine manufacturers to produce increasingly efficient power plants in order to remain competitive. Improving...

...  = 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 distribution of pressure created by the structures produces the Coriolis forces needed to generate radial...

...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...