Results 61 to 70 of about 5,519 (211)

A Method for the Suppression of Rotating Cavitation by an Accumulator at the Inlet of an Inducer

Journal of Fluid Science and Technology, 2008
In the present paper, a new method for the suppression of unsteady cavitation in a turbopump inducer is proposed. An accumulator with a large volume is placed at the upstream of the inducer to equalize the pressure around the periphery.
Akira FUJII, Shinichi MIZUNO, Hironori HORIGUCHI, Yoshinobu TSUJIMOTO   +3 more
doaj   +1 more source

An expert system to analyze high frequency dependent data for the space shuttle main engine turbopumps [PDF]

The prototype expert system ADDAMX identifies selected sinusoid frequencies from spectral data graphs as speed frequencies and harmonics from each turbopump, frequency feed through from one turbopump to another, frequencies generated by turbopump ...
Garcia, Raul C., Jr.
core   +1 more source

Design, Synthesis, and Characterization of Lightweight Medium/High Entropy Alloys—A Review

Engineering Reports, Volume 7, Issue 5, May 2025.
Lightweight high‐entropy alloys (HEAs) offer exceptional properties like low density, high strength, and thermal stability, making them ideal for aerospace and automotive applications. The paper explores their design, synthesis, and characterization, emphasizing their potential for high‐performance application in aerospace and automotive industries ...
Fainah Madewu, Nicholus Malatji, Mxolisi Brendon Shongwe, Tawanda Marazani, Lehlogonolo Rudolf Kanyane   +4 more
wiley   +1 more source

Enhanced Blade Fault Diagnosis Using Hybrid Deep Learning: A Comparative Analysis of Traditional Machine Learning and 1D Convolutional Transformer Architecture

Engineering Reports, Volume 7, Issue 5, May 2025.
The methodology comprises several key steps involving vibration data acquisition, preprocessing, hyperparameter tuning, model training, evaluation, and finally fault classification. ABSTRACT Artificial intelligence offers a promising solution for the precise identification of faults in rotating machinery.
Syed Asad Imam, Meng Hee Lim, Ahmed Mohammed Abdelrhman, Iftikhar Ahmad, Mohd Salman Leong   +4 more
wiley   +1 more source

MATHIMATICAL MODEL TO PREDICT THE DESIGN ANI) PERFORMANCE OF HIGH.SPEED TURBOPUMPS

Journal of Engineering
In this work a high-speed turbopumps of (22000 rpm) rotational speed, which are oxidizer and fuel turbopumps, are designed. The design requirement for mass flow rate and outlet pressure are (12.5 kg/s) and (113×10 Pa) respectively for the oxidizer ...
All Ahmed Gitan , Najdat N. Abdulla , Abdul Kareem A. Al-Doori   +2 more
doaj   +1 more source

Rocketdyne LOX bearing tester program [PDF]

The cause, or causes, for the Space Shuttle Main Engine ball wear were unknown, however, several mechanisms were suspected. Two testers were designed and built for operation in liquid oxygen to empirically gain insight into the problems and iterate ...
Beatty, R. F., Keba, J. E.
core   +1 more source

Reliability analysis of structural ceramic components using a three-parameter Weibull distribution [PDF]

, 1992
Described here are nonlinear regression estimators for the three-Weibull distribution. Issues relating to the bias and invariance associated with these estimators are examined numerically using Monte Carlo simulation methods.
Duffy, Stephen F., Powers, Lynn M., Starlinger, Alois   +2 more
core   +3 more sources

Investigation of non-linear reactions in rotors’ bearing supports of turbo-pump units for liquid rocket engines [PDF]

Журнал інженерних наук, 2018
This paper is aimed at refinement of the computational model of the turbopump rotor systems associated taking into consideration the effect of rotation of moving parts and compliance of bearing supports elements. The up-to-date approach for investigation
Pavlenko I. V., Simonovskiy V. I., Pitel’ J., Demianenko M. M., Verbovyi A. Ye.   +4 more
doaj  

Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †

International Journal of Turbomachinery, Propulsion and Power, 2018
The paper presents an experimental campaign aimed at the characterization of the relationship between cavitation-induced instabilities and forces acting on the shaft, relevant to space application turbopumps.
Dario Valentini, Giovanni Pace, Angelo Pasini, Ruzbeh Hadavandi, Luca d’Agostino   +4 more
doaj   +1 more source

Study of the capability of detection of structural abnormality in rotating machines with SSA

Mechanical Engineering Journal, 2016
The detection of the presence of a structural abnormality in rotating machines with parts without gap, such as rigid couplings, by using the conventional method of vibration RMS, is difficult.
Manabu TSUNOKAI, Jeremy KNOPP, Kazuyuki DEMACHI, Stéphane PERRIN, Ryo KAYATA   +4 more
doaj   +1 more source