Simulation Engineer - CFD (Combustion)

CADFEM APAC; Hyderabad; On-site; INR 1,000,000 - 1,400,000; Full time

Job summary

CADFEM APAC is seeking an expert in CFD to perform high-fidelity simulations for scramjet and ramjet engines using ANSYS Fluent and Chemkin. The role requires deep understanding of combustion concepts, turbulence-chemistry interaction, and reaction kinetics modeling with Chemkin, providing reliable predictions for high-speed reactive flows.

The candidate will develop kinetic mechanisms, analyze shock- combustion interactions, and post-process results to support propulsion design and reliability

Qualifications

• High-speed reactive flow CFD experience with scramjet/ramjet contexts.
• Experience with ANSYS Fluent and Chemkin for combustion simulations.
• Knowledge of turbulence-chemistry interaction and finite-rate chemistry models.

Responsibilities

• Run high-fidelity CFD simulations of scramjet/ramjet flows.
• Model combustion kinetics and fuel-air mixing under hypersonic conditions.
• Develop and validate kinetic mechanisms for hydrogen and hydrocarbon fuels.

Skills

CFD fundamentals

ANSYS Fluent

Chemkin

STAR-CCM+

OpenFOAM

Turbulence models

Shock interactions

MATLAB (post-processing)

Tools

ANSYS Fluent

ANSYS Chemkin

STAR-CCM+

OpenFOAM

Cantera

Reaction Workbench

MATLAB

Job description

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+.

Job Description

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-quality simulations 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/hypersonic 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

• 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.