Conceptual Design and Performance Analysis of an Expander for the Recovery of Potential Energy Stored in Compressed Hydrogen

In the scope of global decarbonisation, hydrogen has been identified as an essential energy carrier. Not only as an energy storage solution for further electrification in vehicles but also as a primary fuel source in processes that rely on chemical energy which cannot be easily electrified. However, at ambient conditions, hydrogen is also a very...

Radial Turbine-Diffuser Interaction: Effect of Tip Gap

This document contains the final Master Thesis Report to obtain the Master of Science on Aerospace Engineering (Flight Performance &amp; Propulsion - Propulsion &amp; Power) at the Delft University of Technology.<br/><br/>The research work focuses on characterizing the interaction of a radial inlet turbine with a downstream diffuser through the...

Multi-Point Fluid-Dynamic Shape Optimization for Turbomachinery

This work sets out the creation, verification and demonstration of an automated end-to-end tool for the multi-point fluid-dynamic optimization of turbomachinery. Taking into account multiple operating conditions during optimization aims to benefit the overall performance of turbomachines which are characterized by off-design operation and to...

Adjoint-based 3D Shape Optimization for Turbomachinery Applications

In order to reduce the carbon foot-print of turbo-generators to global warming, a step-change in the design process is needed. Extensive CFD simulations coupled with optimization algorithms are required, resorting to novel techniques to capture the complex flow phenomena occurring in the passage. However, the computation of the optimization...

Active subspaces for the optimal meanline design of unconventional turbomachinery

The preliminary fluid dynamic design of turbomachinery operating with non-standard working fluids and unusual operating conditions and specifications can be very challenging because of the lack of know-how and guidelines. Examples are the design of turbomachinery for small-capacity organic Rankine cycle and supercritical CO₂ cycle...