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  • Intake Performance » Aircraft Research Association
    Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Military Aircraft UAV s and Missiles Intake Performance The intakes of the vehicle i e aircraft cruise missile etc deliver the air to the engines It is important that the air flowing into any engine is well behaved so that the engines operate efficiently and reliably with minimal maintenance The intakes must retain optimal functionality throughout the operational envelope whatever the speed or attitude of the vehicle Why ARA ARA has extensive experience in the design and manufacture of bespoke ejectors and engine face rakes together with appropriate intake models and support structures We also have an on site intake duct calibration facility the Mach Simulation Tank It can be used to calibrate model engine nacelle duct intake thrust and discharge coefficients over the range of pressure ratios experienced in both the Transonic Wind Tunnel and a quiescent environment This facility may also be used to check the operation of engine face rakes Due to the dynamic nature of air flow a high speed data acquisition system is also vital ARA has a bespoke system for the acquisition of high speed steady state and dynamic data in real time during testing Coupled with real time data reduction techniques this system provides immediate access to the results of pressure recovery and distortion using the ARA data monitoring system A Typical Test An intake test involves the design and manufacture of a model of an appropriate section of the vehicle to be tested for an aircraft this might be the forward fuselage only whilst for a missile it may consist of most of the fuselage and the wings in the appropriate deployed position Integrated into this model is an ejector powered by a supply of high pressure air which induces the required

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/military-aircraft-uavs-and-missiles/intake-performance/ (2016-02-17)
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  • Installed Store Loads » Aircraft Research Association
    Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Installed Store Loads Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Military Aircraft UAV s and Missiles Installed Store Loads Installed stores are items like fuel tanks and weapons which are carried by the aircraft externally on pylons or in internal weapon bays The very complicated nature of the airflow around an aircraft and the stores that are attached to it means that wind tunnel tests remain an important part of most store integration programs Wind tunnel tests provide the large quantities of high quality data needed to provide store loads throughout the aircraft s operational envelope with speed and reliability For some full models the use of an internally mounted balance is not possible i e models with full ducted air flow where there is insufficient room remaining within the model to house a suitable balance In these cases the pressure measuring method is utilised to acquire sufficient data to enable loads to be obtained by integrating pressures over the whole model or indeed for individual portions of the model Wind tunnel tests provide the high quality balance or pressure data depending on the methodology used needed to determine the loads on the overall model or control panels Why ARA We have a world leading capability in the manufacture of stores support mechanisms and balances completed to the very highest standards including bespoke stores with free floating seeker heads and with spring loaded free floating canards or fins ARA is also a world leader in the provision of small panel balances together with many years of experience in the use of pressure measurement techniques for overall models and control

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/military-aircraft-uavs-and-missiles/installed-store-loads/ (2016-02-17)
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  • Isolated Store Loads » Aircraft Research Association
    and Repeatability Productivity Customer Facilities Other Test Facilities Balance Calibration Laboratory Mach Simulation Tank Propeller Test Cell Small Scale Transonic Tunnel 2 Dimensional Tunnel Large Scale Thrust Measuring Rig New Page es Diseño y fabricación CAD Design Services Precision Model Manufacture Inspection Services Finite Element Analysis Strain Gauge Balance Design and Manufacture Dinámica de fluidos computacional CFD Software Code Development CFD Software Code Application Applied Aerodynamics Integrated CFD Wind Tunnel Weapons and Weapon Bay Analysis Wing Design Process Aerodynamic Research Innovación y tecnología Clean Sky Project Strain Gauge Balance Developments Pressure Sensitive Paint Model Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Isolated Store Loads Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Military Aircraft UAV s and Missiles Isolated Store Loads Isolated stores are items which are separated from a parent aircraft they range from fuel tanks and missiles to ejector seats deployed parachutes and flight refuelling probes Understanding of the aerodynamic loads on these stores is required for many purposes which depend on the nature of the store examples include the development of flight control systems for a missile or to ensure the safety of an ejector seat Wind tunnels can be used for full scale and near full scale testing of isolated stores in a controlled environment prior to flight test For stores with complicated airflows wind tunnels can provide large quantities of high quality data to validate numerical simulations Why ARA ARA offers a one stop service for customers starting with the design and manufacture of stores and balances followed by gauging and calibration of balances and finishing with a test program in

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/military-aircraft-uavs-and-missiles/isolated-store-loads/ (2016-02-17)
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  • Data Quality and Repeatability » Aircraft Research Association
    Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Data Quality and Repeatability Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Data Quality and Repeatability The increasing demand for high quality data and comparisons of detailed differences between configurations means that data quality and repeatability must be maintained for all forms of testing To achieve this objective it is essential to have a very thorough understanding of the quality of flow in a tunnel and to be able to monitor and attain very high standards of repeatability of data measurement As part of our ISO 9001 2000 QA Certification ARA ensures that the highest of standards of data quality for our wind tunnels are maintained This is achieved through the use of a calibration procedure which provides a continuous monitoring of data quality by use of A reference databank of flow angularity measurements formed from all models tested which enables values computed for new similar models to be verified A reference model to provide a means of demonstrating repeatability not just of data measurement but also of the complete wind tunnel testing process A centreline calibration probe to measure longitudinal Mach number distributions in the wind tunnel A rotating flow survey rig fitted with alternative probes to measure flow angularity and unsteadiness Data Quality From the measurements made in the ARA transonic wind tunnel using the centre line calibration probe and the rotating flow survey rig the set of statements given below can be made regarding flow uniformity throughout the working section ARA TWT Flow Uniformity Mach Number Variation 0 0005 Subsonic fan only 0 0010 Subsonic auxiliary

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/data-quality-and-repeatability/ (2016-02-17)
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  • Productivity » Aircraft Research Association
    Stability and Control Intake Performance Installed Store Loads Isolated Store Loads Data Quality and Repeatability Productivity Customer Facilities Other Test Facilities Balance Calibration Laboratory Mach Simulation Tank Propeller Test Cell Small Scale Transonic Tunnel 2 Dimensional Tunnel Large Scale Thrust Measuring Rig New Page es Diseño y fabricación CAD Design Services Precision Model Manufacture Inspection Services Finite Element Analysis Strain Gauge Balance Design and Manufacture Dinámica de fluidos computacional CFD Software Code Development CFD Software Code Application Applied Aerodynamics Integrated CFD Wind Tunnel Weapons and Weapon Bay Analysis Wing Design Process Aerodynamic Research Innovación y tecnología Clean Sky Project Strain Gauge Balance Developments Pressure Sensitive Paint Model Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Productivity Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Productivity Productivity for Aircraft and Isolated Store Models The productivity of wind tunnel testing can be measured in terms of the number of configurations or builds that are tested in a day and the number of polars for which data is measured in a day The absolute amount of each of these that can be achieved will be dependent upon the precise details of a test programme The figures given in the table below show the high levels of productivity that can be achieved typically within the ARA transonic wind tunnel for both the continuous and pitch pause model movement approaches Typical Productivity Levels Type of Model Movement Configurations per hour Continuous 10 Pitch Pause 4 Productivity for Store Release Testing Typically a store release test will be composed of taking data for a number of trajectories of the store from the parent

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/productivity/ (2016-02-17)
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  • Customer Facilities » Aircraft Research Association
    Control Intake Performance Installed Store Loads Isolated Store Loads Data Quality and Repeatability Productivity Customer Facilities Other Test Facilities Balance Calibration Laboratory Mach Simulation Tank Propeller Test Cell Small Scale Transonic Tunnel 2 Dimensional Tunnel Large Scale Thrust Measuring Rig New Page es Diseño y fabricación CAD Design Services Precision Model Manufacture Inspection Services Finite Element Analysis Strain Gauge Balance Design and Manufacture Dinámica de fluidos computacional CFD Software Code Development CFD Software Code Application Applied Aerodynamics Integrated CFD Wind Tunnel Weapons and Weapon Bay Analysis Wing Design Process Aerodynamic Research Innovación y tecnología Clean Sky Project Strain Gauge Balance Developments Pressure Sensitive Paint Model Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Customer Facilities Aircraft Research Association Servicios Aerodinámica experimental Transonic Wind Tunnel Testing Customer Facilities We take pride in the standard of service and care we provide our customers before during and after a test Secure Model Assembly Area ARA has five seperate model bays which are connected to the working section of the Transonic Wind Tunnel TWT They help to increase the privacy and security of the model as they allow it to be assembled in a secure environment Secure Customer Rooms Fully IT enabled rooms are available for customer use before during and after a test PCs running Windows or Linux and printers are available upon prior request A firewall protected secure customer network is available in the room customers regularly provide their own equipment for connection to the network to enable use of customer proprietary data analysis software Secure Data Transmission ARA has experience in setting up and supporting both ARA supplied and customer

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/transonic-wind-tunnel-testing/customer-facilities/ (2016-02-17)
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  • Other Test Facilities » Aircraft Research Association
    Performance Installed Store Loads Isolated Store Loads Data Quality and Repeatability Productivity Customer Facilities Other Test Facilities Balance Calibration Laboratory Mach Simulation Tank Propeller Test Cell Small Scale Transonic Tunnel 2 Dimensional Tunnel Large Scale Thrust Measuring Rig New Page es Diseño y fabricación CAD Design Services Precision Model Manufacture Inspection Services Finite Element Analysis Strain Gauge Balance Design and Manufacture Dinámica de fluidos computacional CFD Software Code Development CFD Software Code Application Applied Aerodynamics Integrated CFD Wind Tunnel Weapons and Weapon Bay Analysis Wing Design Process Aerodynamic Research Innovación y tecnología Clean Sky Project Strain Gauge Balance Developments Pressure Sensitive Paint Model Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Other Test Facilities Aircraft Research Association Servicios Aerodinámica experimental Other Test Facilities ARA offers a range of facilities which can be used together or separately to deliver the test requirements of our customers These facilities include The Transonic Wind Tunnel TWT which operates continuously from Mach 0 2 to Mach 1 4 The Balance Calibration Laboratory is used

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/other-test-facilities/ (2016-02-17)
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  • Balance Calibration Laboratory » Aircraft Research Association
    Separation Stability and Control Intake Performance Installed Store Loads Isolated Store Loads Data Quality and Repeatability Productivity Customer Facilities Other Test Facilities Balance Calibration Laboratory Mach Simulation Tank Propeller Test Cell Small Scale Transonic Tunnel 2 Dimensional Tunnel Large Scale Thrust Measuring Rig New Page es Diseño y fabricación CAD Design Services Precision Model Manufacture Inspection Services Finite Element Analysis Strain Gauge Balance Design and Manufacture Dinámica de fluidos computacional CFD Software Code Development CFD Software Code Application Applied Aerodynamics Integrated CFD Wind Tunnel Weapons and Weapon Bay Analysis Wing Design Process Aerodynamic Research Innovación y tecnología Clean Sky Project Strain Gauge Balance Developments Pressure Sensitive Paint Model Deformation Measurement New Page es Media Centre Image Library Video Gallery Document Downloads Newsletter Registration Careers Vacancies New Page es New Page es New Page es New Page es Benefits Apprentices Personal Experiences Graduates Industrial Placements Work Experience Contact Balance Calibration Laboratory Aircraft Research Association Servicios Aerodinámica experimental Other Test Facilities Balance Calibration Laboratory ARA designs and manufactures balances for customers as well as for use in the ARA wind tunnels This includes main model balances with load capacities of up to 17 800 Newtons small store balances with load capacities of 30 Newtons and sting balances All of ARA s manufactured balances are calibrated in the Balance Calibration Laboratory All balances are calibrated to a very high standard using high accuracy dead weight loadings ARA also offers a calibration service for customer supplied balances Non standard balance installations can be accommodated with specialised loading adapters All the balance calibration equipment is traceable to UK national standards Technical Capabilities Standard equipment used to perform dead weight loadings in the calibration frame which incorporates pitch and roll levelling mechanisms Non standard balance set ups supplied with the necessary specialised loading adaptors A balance

    Original URL path: http://www.ara.co.uk/es/servicios/aerodinamica-experimental/other-test-facilities/balance-calibration-laboratory/ (2016-02-17)
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web-archive-uk.com, 2017-12-11