Experimental investigation of cold flow TIC nozzles, a spectral analysis

Author(s):  
Chloe Genin ◽  
Ralf H. Stark
2014 ◽  
Vol 606 ◽  
pp. 147-151 ◽  
Author(s):  
M.S. Somia Alfatih ◽  
M. Salman Leong ◽  
L.M. Hee

Bispectral analysis is one of the relatively more recent tools in signal processing used for detection and identification of higher harmonics in a signal. It is also acknowledged to be one of Higher Order Spectral Analysis (HOSA) effective tools for detecting nonlinear behavior in mechanical systems. In this study, vibration sources in a hydraulic machine which may have features of nonlinear behavior were investigated. An experimental study was undertaken to formulate a more sensitive and effective method using Bispectral analysis to diagnose cavitation in a centrifugal pump facility. Cavitation was induced on the suction side of the pump. The cavitation signal was analyzed with and without induced cavitation conditions at different locations on the pump, and analyzed using FFT and bispectrum methods. It was observed that bispectral analysis could be used as an early indicator of cavitation with changes for severity of cavitation.


1988 ◽  
Vol 102 ◽  
pp. 267-269
Author(s):  
E.V. Aglistkii ◽  
A.N. Panin ◽  
U.I. Safronova ◽  
S.A. Ulitin ◽  
L.A. Vainshtein ◽  
...  

AbstractSatellite lines of the He-like second resonance lines (i.e. 1s2− 1s3p) of P, K, Fe, Cu are studied. The spectral resolution of P is better than those of K, Fe, Cu, obtained by a different experimental set-up. The atomic parameters, required for the spectral analysis and obtained by two different theoretical methods, are compared.


2014 ◽  
Author(s):  
Shane Close ◽  
Victoria Adkins ◽  
Kandice Perry ◽  
Katheryn Eckles ◽  
Jill Brown ◽  
...  

2008 ◽  
Author(s):  
Ji Ha Lee ◽  
Sung Won Choi ◽  
Ji Sun Min ◽  
Eun Ju Jaekal ◽  
Gyhye Sung

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