Characterization

of Turbulent Wall Jet

2022

Coursework

Summary

  • Designed a wall jet experiment to study turbulence structure and ranked #3/70 in Mechatronics class

  • Built a traversing flow measurement setup with stepper motors and a pitot tube controlled by LabView algorithm

Mission

Study the mean velocities and turbulence structure of a wall jet.

A thorough knowledge of the fluid mechanics of the wall jet can improve the future design of industry devices, such as gas-turbine combustion chambers.

My Role

  • Investigated literature for existing wall jet data as experiment baseline.

  • Built the experiment setup using a fan, acrylic boards, and a moving pitot tube.

  • Conducted data analysis with Matlab and compared against literature.

Results

Presented findings of turbulent wall jet:

  • Turbulence velocity profiles are self-similar, which means they are independent of the fluid medium.

  • Examined the growth rate and decay of streamwise velocity compared with literature data.

Comparing our self-similarity plot to the literature.

Comparing our decay of streamwise mean velocity to the literature.

Complete Work

Collaborator: Warren Su