Theoretical analysis and experiment on gas film stiffness with slip flow in a spiral-grooved dry gas seal

What is it about?

We first attempt to calculate gas film stiffness in consideration of slipping effect by using the new test technology for dry gas seals. An optimum value of the spiral angle (76.8º) and groove depth 1×10-5 m for improved gas film stiffness is clearly seen. The average error between experiment and theory is less than 20%.

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