Simulation Engineer - CFD (Combustion)

Job Summary

Expertise in CFD and Scramjet Combustion. The ideal candidate will have a
deep understanding of Combustion concepts, turbulence-chemistry
interaction models, chemistry solvers. Reaction Kinetics modeling using
Chemkin and possess excellent problem-solving skills to deliver high-qualitysimulations for various projects. Function as a solution specialist in the field of
Computational Fluid Dynamics using simulation tools such as ANSYS FLUENT,
Chemkin or Star CCM+.

Key Responsibilities

• Perform high-fidelity CFD simulations of high-speed reactive flows in
  scramjet and ramjet engines using tools such as ANSYS Fluent and ANSYS
  Chemkin, capturing coupled effects of fluid dynamics, combustion, and
  heat transfer.

• Model combustion kinetics and fuel–air mixing under supersonic and
  hypersonic flow conditions, incorporating finite-rate chemistry, turbulence
  chemistry interaction, and high-temperature gas effects.

• Develop and validate detailed or reduced chemical kinetic mechanisms for
  hydrogen, hydrocarbon, or multi-species fuel systems to predict ignition
  delay, flame structure, and combustion efficiency accurately.

• Simulate high-enthalpy flow environments, accounting for thermochemical
  nonequilibrium, dissociation, recombination, and radiation effects relevant
  to hypersonic combustion systems.

• Analyze shock–combustion interactions and shock-induced ignition
  phenomena, studying flame stabilization, pressure rise, and thermal
  choking effects within scramjet isolators and combustors.

• Conduct parametric and design studies to optimize fuel injection strategies,
  mixing enhancement techniques, and combustor geometries for improved
  efficiency and reduced total temperature and wall heat loads.

• Generate high-quality meshes and ensure grid independence for reactive
  flow regions, capturing boundary layers, shear layers, and flame fronts accurately in complex combustor geometries.

• Apply and compare turbulence and combustion models (RANS, LES, DES,
  Flamelet, PDF, or Finite Rate/Eddy Dissipation models) to ensure robust and
  physically accurate prediction of reacting flow fields.

• Post-process and interpret simulation results to extract key performance
  parameters such as combustion efficiency, heat release rate, species
  distribution, total pressure loss, and thermal loading, supporting design
  decision-making.

• Document and present technical findings through comprehensive reports
  and visualization of flame structures, flow fields, and temperature contours,
  providing recommendations for combust or performance optimization and
  system reliability improvement. Troubleshoot and resolve design issues
  relating to convergence issues.

• Document CFD analyses, simulation methodology, and results in
  professional engineering reports and presentations.

• Support testing team when needed, correlate simulation predictions with
  actual measurements or lab tests.

• Interface with customers and project teams to understand requirements,
  communicate progress, and propose design modifications.

• Stay abreast of advancements in simulation methodologies, electronics
  cooling, and thermal management technologies

Requirements

• Required Skills:

• Simulate high-speed reactive flows in scramjet engines
  using ANSYS Fluent and ANSYS Chemkin.

• Model combustion kinetics and fuel-air mixing under
  supersonic/hypersonic conditions.

• Perform parametric studies to improve combustion
  efficiency and reduce thermal loads.

• Knowledge of high-enthalpy flow physics and shock
  induced combustion phenomena.

• Knowledge of Scramjet Combustion Modelling
  mandatory

• Strong fundamentals in CFD with Ansys Chemkin
  knowledge- Preferred

• Aerospace (or) Mechanical with strong knowledge on
  Combustion simulations

• Knowledge of gas dynamics and shock interactions
  mandatory

• Knowledge of external aerodynamics– mandatory

• Basic knowledge of MATLAB for post-processing

• Preferred Skills:

• Strong foundation in combustion physics and gas
  dynamics, including ignition, flame stabilization, and high
  enthalpy reacting flows.

• Proficiency in CFD tools such as ANSYS Fluent, ANSYS
  Chemkin, STAR-CCM+, or OpenFOAM for simulating
  reactive and compressible flows.

• Experience with combustion models — finite-rate
  chemistry, Eddy Dissipation, Flamelet, or PDF approaches
  —and selection based on flow regime.

• Knowledge of turbulence–chemistry interaction using
  RANS, LES, or DES methods for accurate prediction of
  unsteady reacting flows

• Skill in developing and reducing chemical kinetic
  mechanisms using Chemkin, Cantera, or Reaction
  Workbench for hydrogen or hydrocarbon fuels.

• Ability to analyze shock-induced combustion and
  supersonic/Hypersonic reacting flows, including scramjet
  and ramjet applications.

• Sound background in Combustion, Computational Fluid
  Dynamics [CFD], Aerodynamics, & Aerothermodynamics,
  Scramjet Engine CFD Modelling, Propulsion, Liquid
  Propellant Rocket Engine Physics.