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Project Overview

In this project led by Ben Falconer, we delve into Particle Image Velocimetry (PIV) techniques, essential for mapping the velocities of flow fields, particularly in jet engine turbulence. Utilizing advanced stereoscopic PIV methods, we capture rapid sequences of images using dual cameras, analyzing the velocity of particles to construct a comprehensive 3D map. Our current experiments at QinetiQ’s Farnborough site focus on evaluating turbulence in jet engines, contributing valuable insights into fluid dynamics and performance optimization. The project exemplifies the integration of engineering principles and experimental research.

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Project Overview

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  1. Project Overview Ben Falconer

  2. Background • A bit about me • Ben Falconer • Came to Warwick 2006 • Computer and Information engineering • MEng project • Project based around PIV • Current experiments taking place in Farnborough

  3. Particle Image Velocimetry • Used to map the velocity of a flow field cross section • Laser creates a light sheet through the flow • Cameras take quick series of images • Correlation yields velocities • Multiple cross sections create a 3D map of the flow field Image courtesy of LaVision

  4. Stereoscopic PIV • PIV using two cameras in stero • Similar to our eyes • Resolves 3D positions • Scheimpflug condition • Focal plane at an angle • Positioning lens at an angle resolves this Image courtesy of LaVision

  5. Processing • Resolve stereoscopic images • Produce a 3D plot of the field from two stereoscopic images. • Cross-correlation • Find movement of each particle within the 3D plots • Produce a velocity mapping for the plane • Plane stitching • Join each plane mappingto form a full area mapping Image courtesy of LaVision

  6. Current Testing • Jet engine • Looking at turbulance • Working with QinetiQ • Farnborough site • Noise Test facility • PIV • Normal • Stereoscopic • Scheduled to restart after Christmas Image courtesy of QinetiQ

  7. Questions

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