The DCAF - A high-enthalpy, long-duration, direct-connect scramjet test facility

1995 ◽  
Author(s):  
M Thompson ◽  
P Pandolfini
Keyword(s):  
Test Facility ◽  
High Enthalpy ◽  
Long Duration

Progress toward a radiative and MHD driven high enthalpy, high pressure, long duration test facility

2000 ◽  
Author(s):  
Gloyd Simmons ◽  
Gordon Nelson ◽  
Richard Miles ◽  
Garry Brown ◽  
Peter Barker ◽  
...  
Keyword(s):  
High Pressure ◽  
Test Facility ◽  
High Enthalpy ◽  
Long Duration

scholarly journals Coaxial Thermocouples for Heat Transfer Measurements in Long-Duration High Enthalpy Flows

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5254
Author(s):  
Shizhong Zhang ◽  
Qiu Wang ◽  
Jinping Li ◽  
Xiaoyuan Zhang ◽  
Hong Chen
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Surface Temperature ◽  
Thermal Effusivity ◽  
Fast Response ◽  
Test Time ◽  
Physical Parameters ◽  
Fourier Number ◽  
High Enthalpy ◽  
Long Duration

Coaxial thermocouples have the advantages of fast response and good durability. They are widely used for heat transfer measurements in transient facilities, and researchers have also considered their use for long-duration heat transfer measurements. However, the model thickness, transverse heat transfer, and changes in the physical parameters of the materials with increasing temperature influence the accuracy of heat transfer measurements. A numerical analysis of coaxial thermocouples is conducted to determine the above influences on the measurement deviation. The minimum deviation is obtained if the thermal effusivity of chromel that changes with the surface temperature is used to derive the heat flux from the surface temperature. The deviation of the heat flux is less than 5.5% when the Fourier number is smaller than 0.255 and 10% when the Fourier number is smaller than 0.520. The results provide guidance for the design of test models and coaxial thermocouples in long-duration heat transfer measurements. The numerical calculation results are verified by a laser radiation heating experiment, and heat transfer measurements using coaxial thermocouples in an arc tunnel with a test time of several seconds are performed.

Optimized Engine Performance for a 1 KW UAV Hybrid Powertrain

2017 ◽  
Author(s):  
Sean P. Brown ◽  
Christopher L. Hagen
Keyword(s):  
Performance Optimization ◽  
Combustion Engine ◽  
Engine Performance ◽  
Test Facility ◽  
Hybrid Powertrain ◽  
Testing Procedures ◽  
Long Duration ◽  
Aerial Vehicle ◽  
Engine Testing

This paper is one of the first publications documenting the performance optimization of a port fuel injected, spark ignited, internal combustion engine for an unmanned aerial vehicle hybrid powertrain. An optimized hybrid powertrain enables long-duration quadcopter flight and provides vertical takeoff and landing capability for fixed-wing aircraft. This technology can improve flight times and lessen runway requirements, helping to solve two of the biggest problems faced by the booming UAV industry. The main activities contributing to this hybrid powertrain effort are the development of a small engine test facility, design of powertrain vehicle integration hardware, and the testing and characterization of both electric motor-generators and fuel-injected two-stroke engines. This paper investigates engine testing completed to date including experimental setup, testing procedures, data post processing, and results.

scholarly journals Development and commissioning of the T6 Stalker Tunnel

2021 ◽  
Vol 62 (11) ◽  
Author(s):  
Peter Collen ◽  
Luke J. Doherty ◽  
Suria D. Subiah ◽  
Tamara Sopek ◽  
Ingo Jahn ◽  
...  
Keyword(s):  
Operating Mode ◽  
Shock Tunnel ◽  
Test Facility ◽  
Experimental Conditions ◽  
Free Piston ◽  
High Enthalpy ◽  
Reflected Shock ◽  
Ground Test ◽  
The Uk ◽  
Test Requirements

Abstract The T6 Stalker Tunnel is a multi-mode, high-enthalpy, transient ground test facility. It is the first of its type in the UK. The facility combines the original free-piston driver from the T3 Shock Tunnel with modified barrels from the Oxford Gun Tunnel. Depending on test requirements, it can operate as a shock tube, reflected shock tunnel or expansion tube. Commissioning tests of the free-piston driver are discussed, including the development of four baseline driver conditions using piston masses of either 36 kg or 89 kg. Experimental data are presented for each operating mode, with comparison made to numerical simulations. In general, high-quality test flows are observed. The calculated enthalpy range of the experimental conditions achieved varies from $$2.7\hbox { MJ kg}^{-1}$$ 2.7 MJ kg - 1 to $$115.0\hbox { MJ kg}^{-1}$$ 115.0 MJ kg - 1 . Graphical abstract

High-pressure high-enthalpy test facility

AIAA Journal ◽  
1971 ◽  
Vol 9 (2) ◽  
pp. 200-204 ◽  
Author(s):  
E. R. PUGH ◽  
R. M. PATRICK ◽  
A. M. SCHNEIDERMAN
Keyword(s):  
High Pressure ◽  
Test Facility ◽  
High Enthalpy
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