Characteristics of micro-gas journal bearings based on kinetic theory

Xiang Jin Rao; Kuo Ming Chang; Wang Long Li

doi:10.1016/j.triboint.2010.10.019

Characteristics of micro-gas journal bearings based on kinetic theory

Xiang Jin Rao
, Kuo Ming Chang
, Wang Long Li

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

According to Poiseuille and Couette flow rate correctors, Q̃p(D,α1,α2) and Q̃C(D,α1,α2), the modified molecular gas lubrication (MMGL) equation is applied for the analysis of micro-gas journal bearings. The effects of gas rarefaction are considered for arbitrary inverse Knudsen numbers (D) and non-symmetric accommodation coefficients (AC) conditions (α₁≠α₂). The combined effects of Q̃p(D,α1,α2) and Q̃C(D,α1, α2) on the performance of micro-gas journal bearings are firstly discussed. The results show that the surface property (AC) of moving surface affects the bearing performance more significantly than that of stationary surface does. The load carrying capacity increases as the AC of moving surface increases or the inverse Knudsen number increases.

Original language	English
Pages (from-to)	241-247
Number of pages	7
Journal	Tribology International
Volume	44
Issue number	3
DOIs	https://doi.org/10.1016/j.triboint.2010.10.019
Publication status	Published - 2011 Mar

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.triboint.2010.10.019

Cite this

@article{db199bea4f454288a9ed924209ab23ca,

title = "Characteristics of micro-gas journal bearings based on kinetic theory",

abstract = "According to Poiseuille and Couette flow rate correctors, {\~Q}p(D,α1,α2) and {\~Q}C(D,α1,α2), the modified molecular gas lubrication (MMGL) equation is applied for the analysis of micro-gas journal bearings. The effects of gas rarefaction are considered for arbitrary inverse Knudsen numbers (D) and non-symmetric accommodation coefficients (AC) conditions (α1≠α2). The combined effects of {\~Q}p(D,α1,α2) and {\~Q}C(D,α1, α2) on the performance of micro-gas journal bearings are firstly discussed. The results show that the surface property (AC) of moving surface affects the bearing performance more significantly than that of stationary surface does. The load carrying capacity increases as the AC of moving surface increases or the inverse Knudsen number increases.",

author = "Rao, \{Xiang Jin\} and Chang, \{Kuo Ming\} and Li, \{Wang Long\}",

note = "Funding Information: This research was supported by the National Science Council, Taiwan , Project no. NSC 98-2221-E-006-061 . ",

year = "2011",

month = mar,

doi = "10.1016/j.triboint.2010.10.019",

language = "English",

volume = "44",

pages = "241--247",

journal = "Tribology International",

issn = "0301-679X",

publisher = "Elsevier Inc.",

number = "3",

}

TY - JOUR

T1 - Characteristics of micro-gas journal bearings based on kinetic theory

AU - Rao, Xiang Jin

AU - Chang, Kuo Ming

AU - Li, Wang Long

N1 - Funding Information: This research was supported by the National Science Council, Taiwan , Project no. NSC 98-2221-E-006-061 .

PY - 2011/3

Y1 - 2011/3

N2 - According to Poiseuille and Couette flow rate correctors, Q̃p(D,α1,α2) and Q̃C(D,α1,α2), the modified molecular gas lubrication (MMGL) equation is applied for the analysis of micro-gas journal bearings. The effects of gas rarefaction are considered for arbitrary inverse Knudsen numbers (D) and non-symmetric accommodation coefficients (AC) conditions (α1≠α2). The combined effects of Q̃p(D,α1,α2) and Q̃C(D,α1, α2) on the performance of micro-gas journal bearings are firstly discussed. The results show that the surface property (AC) of moving surface affects the bearing performance more significantly than that of stationary surface does. The load carrying capacity increases as the AC of moving surface increases or the inverse Knudsen number increases.

AB - According to Poiseuille and Couette flow rate correctors, Q̃p(D,α1,α2) and Q̃C(D,α1,α2), the modified molecular gas lubrication (MMGL) equation is applied for the analysis of micro-gas journal bearings. The effects of gas rarefaction are considered for arbitrary inverse Knudsen numbers (D) and non-symmetric accommodation coefficients (AC) conditions (α1≠α2). The combined effects of Q̃p(D,α1,α2) and Q̃C(D,α1, α2) on the performance of micro-gas journal bearings are firstly discussed. The results show that the surface property (AC) of moving surface affects the bearing performance more significantly than that of stationary surface does. The load carrying capacity increases as the AC of moving surface increases or the inverse Knudsen number increases.

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U2 - 10.1016/j.triboint.2010.10.019

DO - 10.1016/j.triboint.2010.10.019

M3 - Article

AN - SCOPUS:78650517023

SN - 0301-679X

VL - 44

SP - 241

EP - 247

JO - Tribology International

JF - Tribology International

IS - 3

ER -

Characteristics of micro-gas journal bearings based on kinetic theory

Abstract

All Science Journal Classification (ASJC) codes

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