Design, optimization and simulation of aerospace thermal-uid components, systems and products, in the quest for faster, quieter,

safer and more economical aerospace travel.

AEROSPACE THERMAL-FLUIDSYSTEM DESIGN

Flownex Simulation Environment delivers technology that enables you to analyze how systems concerned with uid motion and heat transfer will behave in the real world.

Flownex system simulation relays the overall eect of changing specic properties of components, allowing clients to examine extensively all possible variations of a system in the design and optimisation of systems.

Flownex is developed in an ISO 9001:2008 and NQA1 quality assu- rance system environment. Flownex is the only software of its kind to hold a nuclear accreditation, a testament to the quality, reliability and accuracy of our simulation software.

On a global scale leading organizations apply our software and service oerings to achieve maximum potential of their systems both in design and operational states. Our promise of fast, reliable and accurate system and subsystem level simulation has immensely beneted our clients. The use of Flownex has set our clients apart from their competitors allowing them to pursue frontiers of engineering simulation. The global demand for Flownex has shown exponential growth over the last few years, and as more organisations adopt our technology we are continuous-ly striving to push the boundaries in system simulation.

By utilising Flownexs swift execution ability, engineers could quickly and easily perform design modications and parametric studies on the combustion chamber. Convection- conduction- and radiation heat transfer was

taken into account as well as the eect of fuel ratio on the combustion temperature. Studies performed in Flownex allowed engineers to determine optimum boundary conditions for further detailed 3D CFD simulations

Challenge: Perform critical analysis of failure cases during dynamic mid-air refuelling of a Mirage F1 Fighter.

Flownex allowed engineers to simulate ow rates and the refuelling sequences of the system, track fuel distribution and investigate valve failure cases. The simulations ensured that, for any single failure case, the system would remain safe and ensure that the centre of gravity (cg) position of the aircraft remain centred.

Aerosud conrmed results predicted by Flownex with ground test results. The simulation provided Aerosud with the condence

of delivering a nal system design that is safe, reliable and conforms to customer requirements.

GAS TURBINE ENGINECOMBUSTION CHAMBER

Flownex enabled engineers to analyze the complete fuel system and its components in an ecient and accurate way, providing them with piece of mind that the nal system design is safe, reliable and conforms to customer requirements.

Jaco GouwsAerosud

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Challenge: Determine ow distribution in gas turbine combustion chambers at the preliminary design phase, taking into account various mechanisms of heat transfer.

DYNAMIC MID-AIR REFUELLING

Primary control boosters.

Retraction and extension of landing gear.

Sweep of wings.

Opening and closing of doors and hatchways.

Autopilots and gun turrets.

Shock absorption and valve lifter systems.

Dive, reverse thrust, ap and wheel brakes.

Pitch changing mechanisms, spoilers on aps.

Bomb bay doors and bomb displacement gear.

Helicopter yaw, pitch, roll and collective control.

Flownex, with a comprehensive library of uid properties and thermal, uid, heat transfer, control and electric circuit components and networks, is well suited to the simulation, design and optimization of the following aerospace systems:

Flownex designer for integration and optimization of thermal- hydraulic systems.

Pump- and pipe selection.

Optimization of pressure distribution in piping.

Transient behavior, pressure surges, water hammer, accumulator design capability.

Library of gas-, lubricating oil- and hydraulic oil properties.

Altitude eects on pressure and temperature.

Temperature eects on uid viscosity.

Customization of specic components for actuators and dedicated control valves.

Control philosophies, Matlab interface.

Optimization of heater- and cooler sizes.

Fuel storage and supply.

Vapour venting.

Bleed air pressurization.

Fuel heating.

Fuel jettison.

Fuel cross-feed and balancing.

Fuel loading scenarios and control.

Probe-and-drogue and ying boom aerial refuelling.

Ground refuelling hydrants, pump and fuel storage tank sizing.

FUEL ANDREFUELLING SYSTEMS

FLOWNEX CAPABILITIES IN SIMULATION OF FUEL AND REFUELLING SYSTEMS

Selection of valves, pumps, piping, tanks, heat exchangers and heating systems.

Simulation of vapor venting and bleed air.

Capability to size hydrants and tanks.

Simulation of emergency scenarios.

Complete fuel system simulation.

Simulation of fuel jettison.

Transient solving capability.

Flownex designer capability to integrate multiple storage and distribution systems.

Flownex model of a typical refuelling system Aerosud used the fuel distribution, hence the distributed weight of the uid to calculate and control a Mirage F1 Fighters centre of gravity using Flownex.

Flownex designer for integration and optimization of thermohy-draulic systems.

Pump selection.

Simulation of pressure distributions in piping.

Simulation of turbodriven pump-, fan-, compressor- and rotor power.

Heat exchanger selection.

Control system analysis, Matlab interface.

Simulation of gas pressurization systems.

Simulation of combustion processes and rocket nozzle characteristics.

Flownex is the ideal simulation software for the quick thermal-uid analysis of gas turbine performance. It provides aircraft engine design- and system engineers with the ability to simulate complicated air- and gas ow patterns through fans, compressors and turbines (e.g. compressor stall and secondary ows between turbine blades), match compressor- and turbine power and compile maps, calculate thrust (with some minor scripting) and shaft power, perform combustion calculations with heat transfer and determine fuel consumption.

Gas turbine thermal-uid analyses.

Compressor- and turbine maps.

Compressor and turbine power matching.

Compressor stall.

Secondary ows in turbines.

Turbine power for pumps, fans, compressors and rotors.

Helicopter gearbox oil cooling systems.

Liquid fuels for rocket propulsion.

Rocket nozzles.

Fuel-air ratio eects on combustion.

Combustion of fuel-air mixtures and rocket propellants.

Rocket reaction control systems (thrust vectoring).

FLOWNEX CAPABILITIES IN SIMULATIONOF PROPULSION SYSTEMS

Turbine blade channel.Rotating annular gap ow.Labyrinth seal.Compressor stage stacking.Rotor-stator cavity*.Rotor-rotor cavity*.Rotating orice*.Pre-swirl nozzle*.User dened vortex ows*.

Seals.

Compressor bleed-o point.

Turbine rotor disk inlet ows.

Cooling ows in turbine blades.

Flow between turbine disks and rotor.

Hydraulic equipment.

Fuel and oxidizer manufacturing.

Ventilation equipment.

Pneumatic equipment.

Heat exchangers, cooling and heating equipment.

FLOWNEX CAPABILITIES Thermohydraulic system design and simulation

Aircraft cabins and cargo bays

Airports

Spacecraft

Removal of waste water.

Replenishment of fresh water.

Tank-, pump-, valve- and piping selection.

Flow network simulation capability.

FLOWNEXCAPABIL IT IES

Design of suppression systems consisting of reservoirs, pumps, piping, valves, sprays and controls.

Transient behavior, pressure surge, uid hammer, accumulator design capabilities.

The Flownex designer capability can be used to determine tank-, pump-, valve- and pipe sizes to deliver the required ow and pressure at the consumption points. The transient simulation capability can be used to simu- late accident scenarios in order to optimize the system for peak performance. Fluid hammer eects due to sudden valve open/closure can be determined and the risk of component failure due to pressure pulses mitigated by assisting with accumulator selection or design.

Two phase ow encountered aerospace systems and processes are complex and often lends itself to improvement and optimisation. Flownexs two phase capabilities provides the user with the capability to simulate, design and analyse two phase systems which cannot be simulated using simple single phase com-pressible or incompressible uids and methods.

Flownexs two phase capabilities can be divided into the following broad categories:

Pure two phase uids: two phase uid in its pure form.

Two phase ow with an incondensable gas: low incondensable gas mass fraction, typically systems with unwanted air ingress.

Psychrometry: low two phase mass fraction.

FLOWNEX CAPABILITIES

Oxygen and casevac gas supply.Wing anti-icing.Chutes and oats for emergency landings on land and in the sea.Food storage and supply in space.Atmosphere composition and revitalization in space.Water and waste management in space.

Air conditioning and distribution.Cabin temperature, pressure and air ow control.

Humidity control of air-water vapor mixtures.Bleed air supply and leak detection.Avionics cooling.

Waste mgt.

Temp &humiditycontrol

Trace contaminantControl subassembly

Urinerecovery

Urine

Processedurine Nitrogen

Waste products

Productwater

Wastewater

Potable waterprocessing

Oxygengeneration

Cabinreturn

Cabinair

CO removal2

O /N control

2 2

Product water

Cond

ensa

te

H2

Overboardventing

Overboardventing

CO2

Air

Air return

Air

Potablewater

dispenser

Handwash/

shaving

ShowerSimulation of thermouid systems, ow and heat transfer.Properties of uids, gas and vapor mixtures.Concentrations of multi-gas mixtures.Simulation of two-phase ows.Simulation of gas pressurization systems.Evaporation and condensation processes.Heat exchanger and heat sink selection.Simulation of complete air conditioning systems.

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OUR REACHFlownex is sold around the globe (visit our site for resellers in your area)www.ownex.com OUR PEOPLE

We employ masters- and PhD-graduated engineers to develop and support Flownex guiding you on how to more eectively use our software tools and maximize your return on investment.

Flownex Simulation Environment enables engineers to predict, design and optimise for ow rates, pres- sures, temperatures and heat transfer rates in uid systems. Such systems include anything from ventilation systems, water and gas distribution

systems up to boiler designs and complete power generation cycles. The ability to simulate systems with any combination of liquid, gas, two phase, slurry and mixture ows in both steady state and dynamic cases makes Flownex the most powerful simulation tool of its kind.

Initial development.

Development of the Implicit Pressure. Correction Method (IPCM) algorithm.

Aircraft engine combustion systems for Rolls-Royce.

Transient/Dynamic simulations.

HTGR Simulation.

Gas mixtures & conduction.

Object oriented.

Rotating components.

Two phase.

Combustion.

Equation element, API.

Control & electric, Excel.

Simulation Environment, in-condensables.

Slurry, expanded combustion.

Expanded Two-phase, expanded heat transfer, trace elements, RELAP coupling.

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