Master Thesis, 30 HP—Intake distortion synthesis using steady-state CFD data to estimate dynamic distortion

Are you a student eager to apply your theoretical knowledge and fresh perspectives to real-world challenges At Saab we believe that innovation thrives on new ideas and your master thesis project could be the spark that ignites our next technological breakthrough.

Your role

We recognise the immense value that students bring to our company. Your academic rigor combined with your enthusiasm for cutting-edge technology allows you to approach problems with a unique and insightful lens. At Saab youll have the opportunity to collaborate with experienced engineers and specialists gaining invaluable practical experience while making a tangible contribution to our growth and development.

Background

The flow in an intake upstream of the compressor should optimally be uniform. However the flow is generally non-uniform and some flight conditions cause higher levels of non-uniform flow. The pressure distribution immediately upstream of the compressor may in such cases be highly unevenly distributed this is also known as intake distortion. Distortion affects engine performance and increases the risk of compressor stall. Hence it is essential to predict the distortion within the entire operational envelope of the engine in order to assess the risk of compressor stall. Steady-state distortion can be predicted with steady-state computational fluid dynamics (CFD) simulations; however the time fluctuating distortion in highly turbulent flow can be far greater than indicated by a steady-state simulation. Dynamic intake distortion can be determined through wind tunnel tests and/or time-accurate CFD simulations. However these options are both highly expensive and time consuming. A faster and less expensive method to estimate dynamic intake distortion is warranted especially for conceptual studies. One such method is to utilise steady-state CFD pressure data together with an estimated fluctuating pressure component to form a synthesised dynamic pressure from which the dynamic distortion can be determined.

Project description

The thesis project aims to explore methodology for estimation of dynamic intake distortion synthesis for conceptual studies. It includes theoretical studies and literature survey practical implementation of theory and evaluation of the methodology. Wind tunnel data of an intake design are available for validation and verification. CFD simulations matching the wind tunnel conditions will be performed within the project. The relationship between steady-state CFD turbulence quantities and measured quantities is not obvious. Can the traditional method be enhanced Perhaps through an enhanced mathematical model or with the help of machine learning. We encourage you bases on your skills to find the best solution.

The Master thesis will be performed at the Propulsion System department at Saab Aeronautics. The department is responsible for air intake design in our military fighters. You will receive support from supervisors with extensive experience in the field ensuring you have the best conditions for success.

Your profile

You are currently a masters student in engineering. You have skills in at least one of the following topics: fluid mechanics CFD programming mathematics numerical methods machine learning.

We provide the support and guidance you need to translate your theoretical knowledge into practical solutions. Join us and become a driving force behind Saabs technological advancements!

This position requires that you pass a security vetting based on the current regulations around/of security protection. For positions requiring security clearance additional obligations on citizenship may apply.

What you will be a part of

Explore a wealth of possibilities. Take on challenges create smart inventions and grow beyond. This is a place for curious minds brave pioneers and everyone in between. Together we achieve the extraordinary each bringing our unique perspectives. Your part matters.

Saab is a leading defence and security company with an enduring mission to help nations keep their people and society safe. Empowered by its 25500 talented people Saab constantly pushes the boundaries of technology to create a safer and more sustainable world.

Saab designs manufactures and maintains advanced systems in aeronautics weapons command and control sensors and underwater systems. Saab is headquartered in Sweden. It has major operations all over the world and is part of the domestic defence capability of several nations. Read more about us here.

Last application day

Contact information

Nor Al-Mosawi Manager

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Stefan Nilsson Master Thesis Supervisor

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