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Fluids Lab Orifice Plate

for Dr. Marra's Introduction to Fluid Mechanics Course

June 2023 - July 2023

Final Product

image For our Introduction to Fluid Mechanics laboratory course, we have experimental systems that show us engineering principles in practice. One of those principles was how a rapid reduction in the diameter of some piping would affect fluid flow properties. Dr. Marra asked me to modernize the old system and this is my final product. 

Planning Phase

Original Setup My task for this project was to design a replacement orifice plate to fit the existing setup shown on the left. The overall system is meant to display fluid mechanics principles to junior undergraduates in mechanical engineering. 
image There were two main issues with the existing system. Firstly, the original orifice plate was difficult for students to effectively replace during the course of the laboratory. Additionally, the pressure measurement measurement locations were placed relatively far from each other. This meant that students needed to subtract the pressure losses over that length of pipe to isolate the pressure drop caused solely by the orifice plate. 
image After making an assessment of the system and evaluating what components should go where, I made a basic mockup of the system in Figma to enable me to easily redesign the system in a low fidelity way. 

Construction Phase

image After finishing the design of the system in Figma and later in Solidworks, I then began building the system. The orifice plate piece itself was machined from stock PVC purchased off McMaster Carr. The rest of the PVC parts were purchased off the shelf. All part product codes were maintained in the Solidworks file to enable easy traceability. The beauty of my design was that a new orifice section could be quickly swapped in and out by hand loosening and tightening the unions involved in the design. Dr. Marra preferred that a replacement section was essentially one continuous part. 
image After machining the part out of the stock PVC, I was easily able to fit everything together with my off-the-shelf parts and seal things together with a solvent welding solution.
Full Installation The rest of the installation came together as detailed in my Figma and Solidworks drawings with sections cut as necessary. Here is my replacement system in place of the previous system.