Search Results for author: Ashoke De

Found 10 papers, 0 papers with code

Role of corner flow separation in unsteady dynamics of hypersonic flow over a double wedge geometry

no code implementations10 Mar 2021 Gaurav Kumar, Ashoke De

The present work seeks out to investigate the origin of such oscillations in a low enthalpy hypersonic flow with different aft wedge angles and wedge length ratios. In the current study, viscous flow over a double wedge at Mach 7 and fore wedge angle of 30{\deg} is considered.

Fluid Dynamics

Effect of Leading Edge Tubercles on Compressor Cascade Performance

no code implementations25 Feb 2021 M. C. Keerthi, M. S. Rajeshwaran, Abhijit Kushari, Ashoke De

In the present study, experiments were performed on a cascade of airfoils with NACA 65209 profile with different tubercle geometries.

Fluid Dynamics

Numerical investigation of MILD combustion using Multi-Environment Eulerian Probability Density Function modeling

no code implementations22 Feb 2021 Akshay Dongre, Ashoke De, Rakesh Yadav

The computations are performed for two different jet speeds corresponding to Reynolds numbers of Re=4100 and Re=8800 for DJHC burner, while Re=10000 is considered for the Adelaide burner.

Fluid Dynamics

Numerical Investigation of Soot Formation in Turbulent Diffusion Flame with Strong Turbulence Chemistry Interaction

no code implementations22 Feb 2021 B. Manedhar Reddy, Ashoke De, Rakesh Yadav

The turbulence-chemistry interaction effects on soot formation are studied using a single variable probability density function (PDF) in terms of a normalized temperature or mixture fraction.

Fluid Dynamics

Effect of Precursors and Radiation on Soot Formation in Turbulent Diffusion Flame

no code implementations22 Feb 2021 Manedhar Reddy B, Ashoke De, Rakesh Yadav

In the first approach soot inception is based on the formation rate of acetylene, while the second approach considers the formation rate of two and three-ringed aromatics to describe the soot inception [1].

Fluid Dynamics

Modal Decomposition of Turbulent Supersonic Cavity

no code implementations29 Jan 2021 Rahul Kumar Soni, Nitish Arya, Ashoke De

Self-sustained oscillation in Mach 3 supersonic cavity with a length-to-depth ratio of 3 is investigated using wall modeled Large Eddy Simulation (LES) methodology for ReD = 3. 39*10^5.

Fluid Dynamics

Investigation of Shock Wave Interactions involving Stationary and Moving Wedges

no code implementations29 Jan 2021 Pradeep Kumar Seshadri, Ashoke De

Inspired by Schardins problem, which involves moving shock interaction with a finite triangular wedge, we study influences of incident shock Mach number and corner angle on the resulting flow physics in both stationary and moving conditions.

Fluid Dynamics

Numerical Investigation of Coaxial GCH4/LOx Combustion at Supercritical Pressures

no code implementations21 Jan 2021 Sindhuja Priyadarshini, Malay K Das, Ashoke De, Rupesh Sinha

The choice of turbulence model, real gas model, and chemical kinetics model are the critical parameters in numerical simulations of cryogenic combustion at high pressure.

Fluid Dynamics

Numerical Study of Trailing and Leading Vortex Dynamics in a Forced Jet with Coflow

no code implementations21 Jan 2021 Bharat Bhatia, Ashoke De

The interaction of trailing and leading vortex structures in low Reynolds number forced (varicose) jet with coflow is studied using Direct Numerical Simulation (DNS), where we report the dynamics of these vortices for a range of varying parameters.

Fluid Dynamics Computational Physics

Numerical simulation of Delft-jet-in-hot-coflow (DJHC) flames using the Eddy Dissipation Concept model for turbulence-chemistry interaction

no code implementations21 Jan 2021 Ashoke De, Ernst Oldenhof, Pratap Sathiah, Dirk Roekaerts

In this paper we report results of a numerical investigation of turbulent natural gas combustion for jet in a coflow of lean combustion products in the Delft-Jet-in-Hot-Coflow (DJHC) burner which emulates MILD (Moderate and Intense Low Oxygen Dilution) combustion behavior.

Fluid Dynamics

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