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Prof Matthew Juniper

Specialist research areas

Acoustics:

 

Hydrodynamic noise

    • generation of noise by oscillating hydrodynamic structures

Noise control

    • control of noise by control of hydrodynamic oscillations

Aerodynamics:

 

Flow-structure interactions

    • masters level course in flow structure interaction

Flow Control:

 

Instability control

    • shape modification for the control of hydrodynamic instabilities

Mixing enhancement

    • software (Instaflow) to predict the frequencies of hydrodynamic instabilities in fuel injectors, for industrial application

Instability:

 

Absolute/convective instability

    • fundamental studies into absolute/convective instability in confined jets and wakes

Nonlinear instability

    • triggering / bypass transition in thermoacoustics; identification of stable and unstable limit cycles in thermoacoustics

Mathematical Foundations:

 

Variational methods

    • application of nonlinear adjoint looping (constrained optimization with variational methods) to thermoacoustics

Nonlinear Dynamical Systems:

 

Bifurcation

    • continuation methods to find periodic solutions and their stability in thermoacoustic systems

Reacting Flows:

 

Flames

    • modelling of thermoacoustic systems; the hydrodynamic stability of flames

Vortex Flows:

 

Vortex instability

    • stability of vortex breakdown bubbles

Wakes/Jets:

 

Jets

    • fundamental studies into absolute/convective instability in confined jets and wakes

Wakes

    • fundamental studies into absolute/convective instability in confined jets and wakes

Departments and Institutes

Engineering (CUED):

Collaborators outside this directory

Application Areas

 

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Environment

    • Noise & vibration

Manufacturing

    • Hi-tech

Transport

    • Aviation

Techniques

 

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Analytical

Physically-based

    • Dimensional analysis
    • Scaling arguments
    • Reduced models

Approximate methods

    • Perturbation techniques

General methods

    • Complex analysis
    • Variational methods

Numerical

Grid-based

    • Direct numerical simulation
    • Reynolds-averaged Navier-Stokes

Localised

    • Finite element modelling

Experimental

Scale

    • Lab-scale

Measurement techniques

    • Hot-wire anemometry
    • High-speed video capture

Data analysis techniques

    • Fourier analysis
    • Statistical techniques