English - EcosimPro Simulation Tool

What is EcosimPro?
EcosimPro is a software tool for modeling and simulating
multidisciplinary continuous and discrete systems. It
incorporates an object-oriented programming language, a
powerful DAE solver and a friendly Graphic User Interface.
© ESA (images by AOES Medialab)
© ESA-AOES Medialab
© Astrium
EcosimPro and EA Internacional
© ESA-AOES Medialab
Empresarios Agrupados Internacional SA (EAI) is an
architect-engineering organisation that was founded in 1971
and belongs to the following companies: Técnicas Reunidas
SA, GHESA Ingeniería y Tecnología SA, Iberdrola Ingeniería y
Construcción SAU, and SOCOIN Ingeniería y Construcción
SLU.
EcosimPro is designed so that components can be reused in many
different systems without having to be reprogrammed. It
provides a highly intuitive environment that enables the user to
easily display simulation schematic diagrams and carry out both
transient and steady state studies.
EA began developing EcosimPro in 1989 under a contract from
the ESA to simulate ECLSS in manned spacecraft. The
multidisciplinary nature of this type of simulation gave rise to
the creation of generic modelling software for use in many
other continually broadening areas.
EA Internacional is the official distributor of ESPSS libraries to
external users.
EcosimPro is an open tool which allows using other existing code
written in C, C++ or FORTRAN and, in turn, generating C++ code
with the final simulation model.
© ESA-C.Carreau
ESPSS
© ESA-S.Corvaja 09
ESPSS Project Developers
Backed by the technical support of ESA, four companies
participate in the development of ESPSS software, thus
guaranteeing a successful simulation tool:
· Empresarios Agrupados, experts in the design and production
of software simulation tools, coordinating partner of the
project and responsible for the ESPSS modelling
European Space Propulsion
System Simulation
ESA Simulation libraries, based on EcosimPro,
for modelling spacecraft and launch vehicle propulsion systems
· EADS Astrium Space Transportation, the main industrial
architect and stage integrator of Ariane launchers,
responsible for User Requirements and Validation cases
· CENAERO, a company at the forefront of CFD and
Optimization methods, responsible for the Advanced 1D
algorithms, zooming with external CFD codes and system
optimization with Max code coupling
· KOPOOS, a company with large experience in Satellite
Propulsion Systems of Chemical and Electrical types,
responsible for the Priming and Tank filling validation cases
EA Internacional S.A.
Magallanes, 3 Madrid
28015 Spain
E-mail: info@ecosimpro.com
URL: http://www.ecosimpro.com
Phone: +34 91 309 81 42
Fax: +34 91 591 26 55
EMPRESARIOS AGRUPADOS

ESPSS SIMULATION PLATFORM
FLUID_PROPERTIES LIBRARY
· The Fluid_properties Library is a set of thermodynamic functions returning the properties of most of the fluids used for rocket applications. Fluids are
supported in different categories depending on the type used:
- Perfect gases properties according to CEA code, or interpolated in external temperature dependent properties files (user modifiable)
TURBO-MACHINERY LIBRARY
· Two different types of turbo-machinery are available: one “generic” model if the off-design
characteristics are unknown, and one specific model which can only be used with user defined
maps, for well-defined turbo-machinery
The European Space Propulsion System Simulation (ESPSS) is an ESA
initiative that aims to create a European simulation platform for spacecraft and
launch vehicle propulsion systems. It consists of a set of libraries based on the
EcosimPro simulation environment. ESPSS provides a state-of-the-art tool for
analyzing different phenomena in propulsion systems validated successfully
with experiments entailing priming cases, two-phase tank filling processes
and the Ariane 5 ESC-A upper stage.
ESPSS libraries are delivered along with the source code, thus allowing the
users to either modify or reuse any of the library components. As ESA holds the
proprietary rights to the ESPSS libraries, any entity interested in using them
need prior approval from ESA.
EcosimPro is a commercial simulation environment developed by Empresarios
Agrupados Internacional S.A. (EAI) and is presently used in other areas such
as environmental control and life support in manned spacecraft, power plant
systems, biological simulation, loop heat pipes, etc. EAI is the official
distributor of the ESPSS libraries.
ESPSS libraries: a summary:
· A specific library providing a standard properties database for propellants,
pressurants and other fluids and materials
© ESA/CNES/ARIANESPACE-P.Baudon © ESA/CNES/P.Baudon
- Simplified liquids interpolated in external temperature dependent properties files (user modifiable)
- Real fluids properties directly interpolated in external 2D properties files (user modifiable), normally obtained running the REFPROP code (NIST)
· The homogeneous model calculates mixtures of a real fluid with a non-condensable gas (quality, void fraction, etc) in case of two phase two-fluid flow
Functions calculating real
properties interpolate in 2D
property tables. Two kind of
interpolations are available:
- Direct interpolation using the
couples P-S, P-H,… and returning
a property.
- Reverse interpolation using the
couples T-S, H-S or Rho-U and
returning pressure.
ESPSS libraries provide palettes of components
which allows building graphically complex systems
T-S thermodynamic diagram
Available real fluids
· Turbine and compressor maps are very general because the parameters are scaling with the
mean radius and the speed of sound. Therefore, given characteristics remain valid for
geometrically similar turbines/compressor, and for different fluids
TANKS LIBRARY
· The Tank_Bladder component models two different fluid cavities, one for the liquid and another for the
gas mixture. It also calculates the bladder movement separating the liquid from the gas
· 1D Tanks calculate the temperature variation along a “vertical” axis. The pressurization of the gas part
by boiling inside the liquid or by filling processes is included in the formulation. The heat and mass
transfer at the liquid/gas interface is also calculated
Model of a Pressurisation system
Tank pressure, liquid height & temperature results
· A general purpose library for two-phase fluid 1D models. Hydraulic or
pneumatic systems with coupled heat transfer networks and controllers can be
COMB_CHAMBERS LIBRARY
easily represented
· Models with one or more chambers can be evaluated under quasi steady or transient conditions
· Specific libraries for the simulation of 1D two-phase tanks and turbo
(start-up and shutdown) where the valve sequences are decisive
machinery components (pumps, turbines and compressors)
· Wall heat exchange, pressure drops,
cavity priming and vaporization
· A specific library for the simulation of combustion chambers, nozzles and
cooling systems
phenomena (progressive consumption
of injected liquid) are taken into account
Some application domains are:
· Modelling of spacecraft or ground pressurization systems including priming
ESPSS palettes of
components
Performances of a Cold Thruster
Xenon cycle (BB actuation)
. The Cooling Jackets components
completely model 3D geometries built
by means of several 3D walls around the
processes, tank behaviour, heat exchange, mechanical or electronic pressure
regulators
FLUID_FLOW_1D LIBRARY
· Hydraulic or pneumatic systems with coupled heat transfer networks and controllers can be easily represented with this library
channels (1D fluid component):
Cooling jacket channels
Thermal nodes distribution
· Modelling of any kind of liquid rocket engine cycle with one or more
combustion chambers including turbo machinery (pumps, compressor and
turbines) and two phase cooling systems
· Programming of the components is non-dependent on the working fluid: conservation equations are stated in a general way, the
fluid phase and the quality being calculated by the properties functions
Start up and shut down representation
· Priming phenomena (with or without a non-condensable gas travelling in a
liquid) can be calculated in pipes or other specific spacecraft subsystems.
ESPSS also permit analyzing in great detail transient aspects due to inertia
© ESA-S.Corvaja 09
(water-hammer), heat exchange (radiators) or control processes
Interaction with other software is possible, especially in the following areas:
Optimization for design and test fitting, coupling to external software (e.g.
CFD…), etc.
ESPSS allows the simulation of the
hydrodynamic cavitation with or without a
non-condensable gas travelling in a liquid
using real properties fluids:
Simplified model of a priming
Pressure surge peaks
Pressure surge peaks
Staged engine model
Chamber & Preburner temperature