Coast down factor- a diagnostic tool to increase the reliability of condition monitoring of a horizontal rotor system

R. Edwin Browne*, K. P. Ramachandran, A. De Silva, D. K. Harrison, M. El Sharif

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The time elapsed between the power supply cut-off to any rotor system and the system to stop is defined as coast down time (CDT). Coast down factor (CDF) is a dimensionless factor determined using an empirical formula from the coast down data acquired. The empirical formula has been logically defined based on the experimental values for the successive drop in speed during deceleration at equal interval of time. This work presents an experimental investigation conducted on horizontal rotor system with journal bearing at different speeds and lubrication pressures. The derived empirical relation for the dimensionless factor, CDF, has been used to obtain the characteristic trend for the rotor during its deceleration. Like CDT, CDF was found to be an indicative parameter with more explicit knowledge of diagnosis and it could effectively be utilized to analyse the behaviour of the rotor during its coast down phase. Analysing CDF trend could be used as diagnostic parameter with improved efficiency for detecting mal function.

Original languageEnglish
Pages (from-to)3-5
Number of pages3
JournalJournal of the Institution of Engineers (India): Mechanical Engineering Division
Volume90
Issue numberAPRIL
Publication statusPublished - 17 Apr 2009

Keywords

  • Coast down factor
  • Coast down time
  • Coast down time phenomenon
  • Coast down time-profile
  • Condition monitoring
  • Diagnostic parameter

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Coast down factor- a diagnostic tool to increase the reliability of condition monitoring of a horizontal rotor system'. Together they form a unique fingerprint.

Cite this