Acoustical Evaluation of Engine Test Cell Facility at the 35th Maintenance Squadron (MXS/MXMPT), Misawa AB, Japan

To ensure the quality standards in engine testing, a growing research effort is put into the modeling of full engine test cell systems. A detailed understanding of the performance of the combined system, engine and test cell, is necessary e.g. to assess test cell modifications or to identify the influence of test cell installation effects on engine performance. This study aims to give solutions on how such a combined engine and test cell system can be effectively modeled and validated in the light of maximized test cell observability with minimum instrumentation and computational requirements. An aero-thermodynamic performance model and a CFD model are created for the Fan-Engine Pass-Off Test Facility at MTU Maintenance Berlin-Brandenburg GmbH, representing a W-shape configuration, indoor Fan-Engine test cell. Both models are adjusted and validated against each other and against test cell instrumentation. A fast-computing performance model is delivering global parameters, whereas a highly-detailed aerodynamic simulation is established for modeling component characteristics. A multi-disciplinary synthesis of both approaches can be used to optimize each of the specific models by calibration, optimized boundary conditions etc. This will result in optimized models, which, in combination, can be used to assess the respective design and operational requirements.

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Advanced Test Cell Diagnostics for Gas Turbine Engines (USAF Automated Jet Engine Test Strategy – AJETS)

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award ◽

10.1115/2001-gt-0012 ◽

2001 ◽

Cited By ~ 3

Author(s):

Michael J. Roemer ◽

Gregory J. Kacprzynski ◽

Michael Schoeller ◽

Ron Howe ◽

Richard Friend

Keyword(s):

Anomaly Detection ◽

Real Time ◽

Gas Turbine ◽

Test Cell ◽

Engine Test ◽

Jet Engine ◽

Test Strategy ◽

Post Test ◽

Test Cells ◽

And Performance

Improved test cell diagnostics capable of detecting and classifying engine mechanical and performance faults as well as instrumentation problems is critical to reducing engine operating and maintenance costs while optimizing test cell effectiveness. Proven anomaly detection and fault classification techniques utilizing engine Gas Path Analysis (GPA) and statistical/empirical models of structural and performance related engine areas can now be implemented for real-time and post-test diagnostic assessments. Integration and implementation of these proven technologies into existing USAF engine test cells presents a great opportunity to significantly improve existing engine test cell capabilities to better meet today’s challenges. A suite of advanced diagnostic and troubleshooting tools have recently been developed and implemented for gas turbine engine test cells as part of the Automated Jet Engine Test Strategy (AJETS) program. AJETS is an innovative USAF program for improving existing engine test cells by providing more efficient and advanced monitoring, diagnostic and troubleshooting capabilities. This paper describes the basic design features of the AJETS system; including the associated data network, sensor validation and anomaly detection/diagnostic software that was implemented in both a real-time and post-test analysis mode. These advanced design features of AJETS are currently being evaluated and advanced utilizing data from TF39 test cell installations at Travis AFB and Dover AFB.

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Annular after reactor with sound attenuator for use in a jet engine test cell and test stand

The Journal of the Acoustical Society of America ◽

10.1121/1.1646999 ◽

2004 ◽

Vol 115 (1) ◽

pp. 19

Author(s):

Norman Lewis Helgeson

Keyword(s):

Test Stand ◽

Test Cell ◽

Engine Test ◽

Jet Engine

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Gas Turbine Engine Test Cell Modeling

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery ◽

10.1115/90-gt-244 ◽

1990 ◽

Author(s):

D. Salinas ◽

E. E. Cooper

Keyword(s):

Kinetic Energy ◽

Gas Turbine ◽

Three Dimensional ◽

Gas Turbine Engine ◽

Test Cell ◽

Dimensional System ◽

Engine Test ◽

Turbine Engine ◽

Coordinate Model ◽

Cartesian Coordinate

A numerical simulation of the aerothermal characteristics of a gas turbine engine test cell is presented. The three-dimensional system is modeled using the PHOENICS computational fluid dynamics code. Results predict the velocity field, temperatures, pressures, kinetic energy of turbulence, and dissipation rates of turbulent kinetic energy. Numerical results from two versions, a cartesian coordinate model and a body fitted coordinate model, are compared to experimental data. The comparison shows good quantitative and very good qualitative agreement, suggesting that numerical modeling would be useful in the preliminary design of gas turbine test facilities.

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