Master Thesis - Investigation of wall heat transfer models applied to HPDI engines

Job description

Transport is at the core of modern society. Imagine using your expertise to shape sustainable transport and infrastructure solutions for the future? If you seek to make a difference on a global scale, working with next-gen technologies and the sharpest collaborative teams, then we could be a perfect match. 

Background
Internal combustion engine components undergo a high degree of thermal load during the combustion stroke. The piston bowl is especially a highly stressed component of the in-cylinder combustion system.  Developing our future engines require simulations tools with a good prediction accuracy when it comes to estimating heat load to the in-cylinder components.

About us
Volvo Group Trucks Technology provides Volvo Group Trucks and Business Area’s with state-of-the-art research, cutting-edge engineering, product planning and purchasing services, as well as aftermarket product support. The Powertrain Engineering Sweden organization is located in Gothenburg and Malmö and has the full worldwide product platform responsibility for heavy duty engines and transmissions.

Content
High momentum burning jets in compression ignition engines create complex flow patterns especially before and after impingement with the wall (piston bowl). Assumptions in standard wall models lead to errors in both the velocity and temperature profiles close to the wall. This in turn leads to incorrect/overprediction of heat transfer in and around the stagnation region.

The question is, what are the main sources of the errors in the assumptions and how can they be corrected and applied to improve wall heat transfer predictions in compression ignition engines? 

The candidate should show a good understanding of the research question. Initially a literature study should be conducted in order to gain information and experience from previous work. Then the wall and turbulence models used in Converge CFD should be compared with high fidelity data in literature (measurement data if available or else LES or DNS data) using a simple case setup (canonical impinging jet case setup). The existing model in Converge CFD can be modified using user function. Once the model is validated for simple case setup, it should be applied to engine sector case and validated with test data.

Background of the candidate
Candidates should be in the final year of Master studies preferably in the faculty of Applies Mechanics or Applied Physics. The candidate should have a strong interest in internal combustion engines, good analytical skills and excellent understanding of physics. Relevant courses include but not limited to: Computational fluid mechanics, heat transfer, impinging jet theory, thermodynamics, programming, basics of internal combustion engines and numerical analysis.

For more information, please contact:

Vignesh Pandian, Simulation Engineer, tel +46 765538489 (vignesh.pandian.muthuramalingam@volvo.com)

Johan Nilsson K, Group Manager – Engine Performance & Simulation, tel +46 769402038 (johan.k.nilsson@volvo.com)

 

We value your data privacy and therefore do not accept applications via mail. 

Last application date: 10th of December 2024. We will perform a continuous selection in this recruitment, please don´t wait to apply if you´re interested in this role. 

 

Who we are and what we believe in 
Our focus on Inclusion, Diversity, and Equity allows each of us the opportunity to bring our full authentic self to work and thrive by providing a safe and supportive environment, free of harassment and discrimination. We are committed to removing the barriers to entry, which is why we ask that even if you feel you may not meet every qualification on the job description, please apply and let us decide.

 

Applying to this job offers you the opportunity to join Volvo Group. Every day, across the globe, our trucks, buses, engines, construction equipment, financial services, and solutions make modern life possible. We are almost 100,000 people empowered to shape the future landscape of efficient, safe and sustainable transport solutions. Fulfilling our mission creates countless career opportunities for talents with sharp minds and passion across the group’s leading brands and entities. 

 

Group Trucks Technology are seeking talents to help design sustainable transportation solutions for the future. As part of our team, you’ll help us by engineering exciting next-gen technologies and contribute to projects that determine new, sustainable solutions. Bring your love of developing systems, working collaboratively, and your advanced skills to a place where you can make an impact. Join our design shift that leaves society in good shape for the next generation.

Job Category:  Technology Engineering

Organization:  Group Trucks Technology

Travel Required:  No Travel Required

Requisition ID:  15172