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Optimization of an impulse pressure generator based on the drop-weight method.

Rudi Anggoro Samodro1, In-Mook Choi1

  • 1University of Science and Technology (UST), 217, Gajeong-ro, Yuseong-gu, Daejeon 34113, South Korea.

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|October 3, 2019
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Summary

A new impulse dynamic pressure generator was optimized using a drop-weight method. This system provides a reliable reference dynamic pressure for calibrating sensors, detailing key design factors for improved performance.

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Area of Science:

  • Mechanical Engineering
  • Metrology
  • Sensor Technology

Background:

  • Accurate calibration of dynamic pressure sensors is crucial for various engineering applications.
  • Existing methods for generating impulse dynamic pressure may lack precision or require complex setups.
  • Development of a secondary standard for impulse pressure generation is needed.

Purpose of the Study:

  • To develop and optimize an impulse dynamic pressure generator based on a drop-weight method.
  • To establish a reliable secondary standard for generating reference dynamic pressure.
  • To investigate parameters influencing impulse pressure generation for sensor calibration.

Main Methods:

  • Utilized a drop-weight method to design and construct an impulse pressure generator.
  • Employed hardware and software filtering techniques to mitigate noise during pressure generation.
  • Systematically varied five key parameters, including piston-cylinder assembly, drop height, drop weight, and pressure transmission medium properties (viscosity, bulk modulus).

Main Results:

  • Optimized the impulse pressure generator by identifying critical design variables.
  • Demonstrated that a larger effective area piston-cylinder assembly enhances impulse pressure speed.
  • Found that controlling peak pressure via drop height offers easier linear control compared to drop weight.
  • Observed that increased drop weight affects both peak pressure and duration.
  • Identified high viscosity fluids with high bulk modulus as optimal for achieving high peak pressures without jittering.

Conclusions:

  • A robust design and implementation method for a drop-weight based impulse pressure generator was proposed.
  • The study provides a detailed characterization for optimizing impulse dynamic pressure generation.
  • The developed system serves as a valuable secondary standard for dynamic pressure sensor calibration.