Showing papers by "Hukam Mongia published in 2011"
04 Jan 2011
33 citations
31 Jul 2011
TL;DR: In this article, an overview of the use of several complex multi-swirler devices in gas turbine combustion and attendant technological advances in emissions, cooling, pattern factor, operability and overall temperature increase across the combustor is given.
Abstract: An overview is given on the use of several complex multi-swirler devices in gas turbine combustion and attendant technological advances in emissions, cooling, pattern factor, operability and overall temperature increase across the combustor. The emphasis of this paper is on the initiation of promising lean-direct injection concepts, LDI and how it led to development of several innovative premix- and partially premix-concepts applicable mostly for the 30 overall pressure ratios, OPR gas turbine engines. I INTRODUCTION
24 citations
31 Jul 2011
TL;DR: In this article, the use of several complex multi-swirler devices in gas turbine combustion and attendant technological advances in emissions, cooling, pattern factor, operability and overall temperature increase across the combustor are discussed.
Abstract: An overview is given on the use of several complex multi-swirler devices in gas turbine combustion and attendant technological advances in emissions, cooling, pattern factor, operability and overall temperature increase across the combustor. The emphasis of this paper is on the development and innovative applications of twin-concentric richand lean-direct injection mixers, their use in the dual-annular combustors, and finally making its extension to premixed mixers for the Dry Low Emissions, DLE twin and triple annular combustors.
15 citations
27 Jun 2011
TL;DR: In this paper, the authors proposed a realizable wall model based on the Reynolds stress model, where the diameter of the orifice inlet is defined by the number of orifices in the wall.
Abstract: CP – Coefficient of pressure d – diameter of the orifice ewt – Enhanced wall treatment e – Dissipation rate h – heat transfer coefficient H – distance of orifice from the target plate k – Kinetic energy L – Nozzle length Nu – Nusselt Number r – radial distance from the axis RKE Realizable k- model RSM – Reynolds stress model Re – Reynolds number Rin – orifice inlet radius Rmax – orifice outlet radius SA – Spalart Allmaras model SKE Standard k- model SST – Shear-stress transport model swf – standard wall function Ui – Velocity tensor
4 citations
27 Jun 2011
TL;DR: In this article, the authors defined the following terms in the ke turbulence model: Ce1, Ce2 -Constants in the k-means equation, Ce3, Ce4 -Addition terms, Ce5, Ce6 -Damping functions, Ce7, Ce8, Ce9, Ce10, Ce11, Ce12, Ce13, Ce14, Ce15, Ce16, Ce17, Ce18, Ce19, Ce20, Ce21, Ce22, Ce23, Ce24, Ce25, Ce26, Ce27,
Abstract: Nomenclature Ce1, Ce2 – Constants in the ke equation. 2 – Jet half width t – Thermal boundary layer thickness D,E – Addition terms in the ke turbulence model e – Dissipation rate ewt Enhanced wall treatment f1, f2 – Damping functions in the „e‟ equation. h – heat transfer coefficient k – Kinetic energy l length scale P – Pressure Pk – Production of kinetic energy Re – Reynolds number RKE Realizable k- model RSM – Reynolds stress model SA – Spalart Allmaras model SKE Standard k- model SST – Shear-stress transport model swf – standard wall function Sij – Strain rate tensor T – temperature Tp – pleanum temperature Ts – surface temperature Ui – Velocity tensor
1 citations