Influence of micro-scale velocity slip on the dynamic characteristics of aerostatic slider

Abstract

Purpose

The purpose of this paper is to propose the pressure fluctuation to further evaluate and predict the dynamic and static characteristics of the aerostatic slider and improve the calculation accuracy of the aerostatic slider.

Design/methodology/approach

First-order velocity slip is introduced into the traditional gas-film fluid equation, and the numerical analysis method is used to solve the static performance of the aerostatic slider. The finite element analysis method is used to solve its dynamic characteristics.

Findings

It can be concluded from the simulation and experimental results that the model considering the velocity slip in the gas film flow is more accurate. The errors between the modal detection results and the vibration detection results (0.8%–5.8%) under speed slip are smaller than the traditional cases (23.7%–210%), which also verifies the correctness of the above conclusions.

Originality/value

In this paper, the method of simulation and experiment is used to prove that the first-order velocity slip model is more suitable to predict the dynamic response of the aerostatic slider than the condition without slip.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0059/

Citation

Chen, D., Kong, S., Liu, J. and Fan, J. (2021), "Influence of micro-scale velocity slip on the dynamic characteristics of aerostatic slider", Industrial Lubrication and Tribology, Vol. 73 No. 1, pp. 120-125. https://doi.org/10.1108/ILT-02-2020-0059