Entropy generation and CO2 emission in presence of pulsating oscillations in a bifurcating thermoacoustic combustor with a Helmholtz resonator at off-design …

Y Guan, S Becker, D Zhao, J Xu, M Shahsavari… - Aerospace Science and …, 2023 - Elsevier
In this work, we develop a 2D numerical model of a Y-shaped bifurcating combustor with a
Helmholtz resonator attached. Propane (C 3 H 8) is fueled and burnt with air by applying …

Numerical investigation of supercritical combustion dynamics in a multi-element LOx–methane combustor using flamelet-generated manifold approach

A Sharma, A De, SS Kumar - Physics of Fluids, 2023 - pubs.aip.org
The article investigates liquid oxygen (LOx)–methane supercritical combustion dynamics in
a multi-element rocket-scale combustor using large eddy simulation (LES). A complex …

Effect of jet splitting using passive strut on the performance and thermoacoustic characteristics of a scramjet combustor

PP Nair, JP Ananthu, V Narayanan - Physics of Fluids, 2024 - pubs.aip.org
A scramjet engine offers a potential route to achieve supersonic speeds using airbreathing
engines. Achieving proper mixing and combustion poses a challenge due to the supersonic …

Brief Review of Recent Achievements in the Flamelet Manifold Selection and Probability Density Distribution for Flamelet Manifold Variables

G Yu, B Li - Journal of Energy Resources …, 2024 - asmedigitalcollection.asme.org
The flamelet model is a commonly used tool for turbulent combustion simulations in the
engineering field due to its computational efficiency and compatibility with complex chemical …

Wall heat transfer prediction in CH4/O2 and H2/O2 rocket thrust chambers using a non-adiabatic flamelet model

N Perakis, OJ Haidn - Acta Astronautica, 2020 - Elsevier
The current work presents the extension of the flamelet model for turbulent combustion
calculations to account for deviations from adiabatic conditions. The aforementioned …

Investigation of injector-coupled combustion dynamics in a methane–oxygen combustor using large eddy simulation and dynamic mode decomposition

A Sharma, A De, S Kumar - Physics of Fluids, 2024 - pubs.aip.org
This paper uses a reactive flow large eddy simulation (LES) and decomposition techniques
to study combustion instabilities in a methane–oxygen combustor. This work examines two …

Modelling of pulsating inverted conical flames: a numerical instability analysis

L da Costa Ramos, LF Figueira da Silva… - … Theory and Modelling, 2022 - Taylor & Francis
The study of combustion-thermoacoustic instabilities is a topic of interest in the development
of engines. However, the modelling of these systems involves a high computational burden …

Transported PDF modeling of compressible turbulent reactive flows by using the Eulerian Monte Carlo fields method

T Pant, U Jain, H Wang - Journal of Computational Physics, 2021 - Elsevier
Although the transported probability density function (PDF) method has been developed for
decades, its application has been mainly focused on the low-Mach number flow problems …

Flamelet modeling of transverse thermo-acoustic instability in a multi-element combustor

T Pant, H Wang - AIAA Scitech 2019 Forum, 2019 - arc.aiaa.org
Combustion instability resulting from thermo-acoustic interaction is a serious issue in
highpower, high-energy density propulsion devices like rocket engines, gas turbines and …

Analysis of self-excited combustion instability in a sub-scale rocket engine using large Eddy simulation

A Sharma, A De, SS Kumar - … 17-20, 2021, IIT Madras, Chennai …, 2021 - dl.begellhouse.com
This paper invokes a reactive flow large eddy simulation (LES) framework to simulate
combustion instabilities in a sub-scale rocket combustion chamber. A model rocket …