Title:
METHOD AND DEVICE FOR MONITORING TURBINE EFFICIENCY OF AUXILIARY POWER UNIT OF AIRPLANE
Document Type and Number:
Japanese Patent JP2015025451
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for monitoring turbine efficiency of an auxiliary power unit of an airplane.SOLUTION: A method for detecting performance of turbine efficiency of an auxiliary power unit APU of an airplane, includes the steps of: acquiring an APU message at a number of time points in a certain period; acquiring starting parameters including a rotating speed, of at least a peak value EGT of the APU on the basis of the APU message; calculating a ratio NPA corresponding to the rotating speed in normal operation of the APU, of the rotating speed when an exhaust temperature has a peak value at the time of starting the APU; calculating an average value of the NPA during the period; and determining a stable period, a degradation period or a failure period of the turbine efficiency of the APU on the basis of the average value of the NPA.
Inventors:
GU ZHUPING
ZHANG CHI
HUANG LEI
DING HUIFENG
WU JIAJU
ZHANG YANFENG
MA HONGTAO
CHEN REI
ZHANG CHI
HUANG LEI
DING HUIFENG
WU JIAJU
ZHANG YANFENG
MA HONGTAO
CHEN REI
Application Number:
JP2014151067A
Publication Date:
February 05, 2015
Filing Date:
July 24, 2014
Export Citation:
Assignee:
AIR CHINA LTD
International Classes:
F02C7/00; B64D41/00; F01D25/00
Domestic Patent References:
| JP2013018482A | 2013-01-31 | |||
| JP2013028341A | 2013-02-07 |
Foreign References:
| US20070260390A1 | 2007-11-08 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito