scholarly journals Evaluation of test results for strain gages and pressure transducers. Ground test reactor (GTR) irradiation test No. 15

1966 ◽  
Author(s):  
E.R. Sita
Keyword(s):  
Test Results ◽  
Strain Gages ◽  
Pressure Transducers ◽  
Irradiation Test ◽  
Ground Test ◽  
Test Reactor

Numerical simulation of fairing separation test for hypersonic air breathing vehicle

2016 ◽  
Vol 231 (2) ◽  
pp. 319-325 ◽  
Author(s):  
Ankit Raj ◽  
K Anandhanarayanan ◽  
R Krishnamurthy ◽  
Debasis Chakraborty
Keyword(s):  
Structural Integrity ◽  
Test Results ◽  
Air Breathing ◽  
Aerodynamic Loads ◽  
Pressure Distributions ◽  
Ground Test ◽  
Computational Fluid Dynamics Simulations ◽  
Euler Solver ◽  
Dynamics Simulations ◽  
Flight Hardware

Fairings are provided to cover hypersonic air breathing vehicle to protect it from adverse aerodynamic loading and kinetic heating. Separation dynamics of fairings is an important event in the launch of vehicle. Extensive computational fluid dynamics simulations are carried out for the design of fairings and vehicle and selection of time sequences of various separation events. A ground test of fairing separation is conducted in the sled facility to check the structural integrity and functionality of various separation mechanisms and flight hardware. Simulations have been carried out to study the separation dynamics of fairings at test conditions using grid-free Euler solver to get the aerodynamic loads and the loads are integrated to get the trajectory of fairings. The aerodynamic loads are provided to verify the structural integrity of various components and the trajectory of panels is used in the test planning. The pressure distributions on the vehicle are compared with the test results.

Ground test results of flight control system for the Smart UAV

ICCAS 2010 ◽  
2010 ◽  
Author(s):  
Young-shin Kang ◽  
Bum-jin Park ◽  
Chang-sun Yoo ◽  
Yu-shin Kim ◽  
Sam-Ok Koo
Keyword(s):  
Control System ◽  
Flight Control ◽  
Test Results ◽  
Flight Control System ◽  
Ground Test

Single event effect ground test results for a fiber optic data interconnect and associated electronics

1994 ◽  
Vol 41 (6) ◽  
pp. 1999-2004 ◽  
Author(s):  
K.A. LaBel ◽  
D.K. Hawkins ◽  
J.A. Cooley ◽  
C.M. Seidleck ◽  
P. Marshall ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Test Results ◽  
Single Event ◽  
Single Event Effect ◽  
Ground Test

Experimental Investigation of a Stall Prediction System Using a Transonic Multistage Compressor

2007 ◽  
Author(s):  
Tomofumi Nakakita ◽  
Masahiro Kurosaki ◽  
Yukio Kamiyoshihara
Keyword(s):  
Axial Compressor ◽  
Prediction System ◽  
Test Results ◽  
Stall Margin ◽  
Pressure Transducers ◽  
Stator Vane ◽  
Multistage Compressor ◽  
Stall Warning ◽  
Stall Control ◽  
Multistage Axial Compressor

This paper describes the test results of a stall prediction system using a transonic multistage axial compressor. The test results show that there is a clear relationship between the stall margin and the stall-warning index measured at the first stage. The stall warning index is derived from auto correlation of casing wall pressure signals above the rotor tip. In the tests, the compressor installed with pressure transducers on the casing wall near the leading edges of the first three rotors was forced to stall while operating at a constant speed by closing the discharge valve. The test results where the stator vane settings of the first three stages were changed show that load distribution among stages does not have significant effects on the stall margin vs. stall-warning index relationship. Using some smoothing technique, undesired time variation of the stall-warning index can be reduced to the level necessary for practical active stall control with allowable response time delay.

scholarly journals Comparison of Fracture Response of Preflawed Tubes Under Internal Static and Detonation Loading

2003 ◽  
Author(s):  
Tong Wa Chao ◽  
Joseph E. Shepherd
Keyword(s):  
Crack Detection ◽  
Strain History ◽  
Strain Gages ◽  
Pressure Transducers ◽  
Gaseous Detonations ◽  
Propagation Behavior ◽  
Significant Difference ◽  
Detonation Loading ◽  
Crack Propagation Behavior ◽  
Axial Surface

Fracture experiments were performed on thin-walled and preflawed aluminum 6061-T6 tubes. Flaws were machined as external axial surface notches. The tubes were 1) statically loaded with oil, 2) statically loaded with nitrogen, and 3) dynamically loaded with gaseous detonations traveling at 2.4 km/s. The experiments were controlled so that comparisons could be made on sets of specimens with the same material, tube and flaw geometry, nominal loading amplitude, and flange supports, with the only difference being the dynamics of the loading. It was found that there is a significant difference in crack propagation behavior for the three types of loading. In this paper, fracture behavior will be discussed along with the fluid dynamics involved. The tubes were also instrumented with pressure transducers, crack detection gages, and strain gages so that data on loading, crack propagating speeds, and strain history can be compared.

Peregrine Hybrid Rocket Motor Ground Test Results

2012 ◽  
Author(s):  
Greg Zilliac ◽  
Benjamin Waxman ◽  
Eric Doran ◽  
Jonathan Dyer ◽  
Arif Karabeyoglu ◽  
...  
Keyword(s):  
Rocket Motor ◽  
Test Results ◽  
Hybrid Rocket ◽  
Hybrid Rocket Motor ◽  
Ground Test
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