Modeling and simulation of a twoshaft gas turbine propulsion. The dat file is compatible for creating splines in unigraphics nx, catia, and solidworks. Numerical propulsion system simulation consortium npss tm user guide software release. In order to investigate the dynamic characteristic of the spacecraft propulsion system, numerical simulation was carried out based on the modular and extensible simulation model upssim. For verified definitions visit all trademarksservice marks referenced on this site are properties of their respective owners. Numerical propulsion system sim ulation npss nichols and chamis, 1991.
Numerical propulsion system simulation npss swri numerical propulsion system simulation npss is an objectoriented. This breakthrough has enabled the detailed simulation of major propulsion system components to. Overview of studies using the numerical propulsion system simulation at utarlington. Pergamon press plc numerical propulsion system simulation r.
Due to the multiphysics nature, simulation is expensive and timeconsuming. Introduction to numerical propulsion system simulation. Implementation of engine loss analysis methods in the. Numerical propulsion system simulation how is numerical propulsion system simulation abbreviated. The rocket propulsion system design coordinates are saved to a dat file which can be used in a cad program to plot a 3d model of the rocket propulsion system. The projectile typically does not contain explosives, which has apparent advantages over traditional methods. Numerical investigations of the engine cooling system in a small power vessel pod propulsion system. System dynamic characteristic simulation of spacecraft. Modeling and simulation of aircraft engines liu electronic press. Physical and numerical modeling for advanced propulsion systems. It will also show the linear model generator s ability to approximate the dynamics of a nonlinear npss engine model. This will provide the product developer with a virtual wind tunnel that will. As an innovative propulsion technology, ultrasonic electric propulsion uep is mainly applied to nanoand microspacecrafts system is investigated by experimental and numerical methods.
Article information, pdf download for modeling and simulation of a. The numerical propulsion system simulation npss code was created. European space propulsion system simulation espss is an european space agency esa toolkit for modelling rocket and satellite propulsion systems. However, despite its great importance, numerical methodologies for detailed investigations on marine propulsion dynamics are not yet widely covered in scientific literature. What is numerical propulsion system simulation npss. Numerical propulsion system simulation southwest research institute, mechanical engineering division machinery department 7 how to get npss for commercial and individual academic users, npss may be obtained from the consortium website. Pdf integrated control modeling for propulsion systems using. Brayton cycles and various rocket propulsion cycles, and industry standardization for. Configuration management file manager developed for. Design, analysis, and simulation of rocket propulsion system. Marine propulsion simulation download ebook pdf, epub. A marine propulsion system is composed of several subsystems that operate in a. The simulation uses validated models for fluid mechanics, heat transfer.
Numerical propulsion system simulation ora research. Four different control methods for ramping down the power output from a supercritical carbon dioxide sco 2 simple cycle were studied to support the development of 10 mwe pilot plant test facility, funded by the us department of energy. The solution of formamide and lithium chloride is employed as propellant. Interested parties can download a trial version or purchase an annual license either as a university. In vehicle drivelines, for example, these include beams, bushings, bearings, point masses and the like. We established a simplified model in time domain incorporating mechanics and electromagnetics to study.
To address these issues, we have developed onyx, a javabased objectoriented application framework for aerospace propulsion system simulation. Electromagnetic propulsion provides a noncontact way for delivering goods. Physical and numerical modeling for advanced propulsion systems 3 ep. Nichols nasa lewis research center, interdisciplinary technology office, cleveland, oh 445, u. The two main difficulties are the numerical stiffness and the variable. The schematic diagram of electromagnetic propulsion system is shown in figure 1. Npss is an objectoriented, multiphysics, engineering design, and simulation environment that enable the development, collaboration, and seamless integration of. Steadystate modeling of gas turbine engines using the numerical propulsion. Introduction to numerical propulsion system simulation npss. A new integrated development environment ide is under development to facilitate. Steadystate modeling of gas turbine engines using the numerical. Generic engine cycle model for analysis in npss including inlet, compressor, burner, turbine, duct and nozzle.
The objective of the numerical propulsion system simulation npss is to provide insight into these complex interactions through computational simulations. Numerical propulsion system simulation npss, a multidisciplinary system of analysis tools that is focussed on extending the simulation capability from components to the lull system. Received 21 may 1991 atraetthe cost of implementing new technology. A study of droplets emission in ultrasonic electric. These detailed transient models are written using npss numerical propulsion system simulation. This paper describes the development of the numerical propulsion system simulation npss, a modular and extensible framework for the integration of multicomponent and multidisciplinary analysis tools using geographically distributed resources such as computing platforms, data bases, and people. This analysis tool set is intended to enable fast, accurate estimation of losses in an engine cycle model with minimal effort on the part of the user. Transient modeling of 10 mw supercritical co2 brayton. Numerical propulsion system simulation npss, a multi disciplinary system of analysis tools that is focussed on extending the simulation capability from. Physical and numerical modeling for advanced propulsion. The analysis is currently focused on largescale modeling of complete aircraft engines. Pdf the numerical propulsion system simulation npss, an advanced engineering. For the present study, the flight optimization system flops, a legacy aircraft synthesis software developed by nasa 14, the numerical propulsion system simulation npss providing engine cycle. The system is closed by two or threeparameter numerical simulation of highspeed separation flow in the aerospace propulsion systems e.
Npss is a concerted effort by nasa glenn research center, the aerospace industry, and academia to develop an advanced engineering environment or integrated collection of software programs for the analysis and design of aircraft engines and, eventually, space transportation components. The main components of the npss models include a compressor, turbine, hightemperature recuperative heat exchanger htr, cooler, heater, pipes, and valves. Npss is an objectoriented, multiphysics, engineering design, and simulation environment that enable the development, collaboration, and seamless integration of system models. Numerical propulsion system simulations npss for space. Numerical propulsion system simulation npss is an objectoriented, multiphysics, engineering design and simulation environment that enables development, collaboration and seamless integration of system models. As shown, the whole simulation region consists of four components, including an outer air cylinder, two electrical conductive rails, the armature not shown between the two rails. Oct 17, 2016 numerical propulsion system simulation npss swri numerical propulsion system simulation npss is an objectoriented.
Transient modeling of 10 mw supercritical co2 brayton power. The numerical propulsion system simulation ntrs nasa. The advantage of pumpjet over other propulsion systems can be defined by two factors including high efficiency and very low acoustic effects. The npss configuration management cm file manager integrated with the common desktop environment cde window management system provides a common look and feel for the configuration management of data, applications, and engine simulations for u. Pumpjet is one of these new systems, mainly employed for the underwater applications. This concept is called the numerical propulsion system simulation npss. Numerical investigations of the engine cooling system in a. Numerical propulsion system simulation how is numerical.
Nowadays surface and underwater vessels with modern propulsion systems and proper hydroacoustic performance have been emerged. The model accurately predicts the global behavior of the spacecraft propulsion system in the priming and shutdown process, and also correctly describes the. This paper presents the progress in developing the numerical propulsion system simulation, a multifidelity simulation of a complete propulsion system. This will provide the product developer with avirtual wind tunnel that will reduce the number of hardware builds and tests required during the development. Lytle, 1999 jones, 2007, 2010 covers more than system. Npss single academic license agreement, numerical propulsion system simulation npss is an objectoriented, multiphysics, engineering design and simulation environment that enables development, collaboration and seamless integration of system models. Numerical analysis of ducted propeller and pumpjet propulsion.
The propulsion system behaviour is a key aspect for the overall dynamics of a ship. Over 3 million unverified definitions of abbreviations and acronyms in acronym attic. Numerical propulsion system simulation listed as npss. Mar 15, 2017 nowadays surface and underwater vessels with modern propulsion systems and proper hydroacoustic performance have been emerged. This virtual wind tunnel, depicted in figure 1, will permit rapid, affordable computation of stability, cost, lifetime, and certification requirements. Npss numerical propulsion system simulator acronymattic. Volume dynamics modeling of a turbofan engine propulsion gui. Coordinates of the injectors are saved to a dat file to be modeled in a cad program as well. Translation find a translation for numerical propulsion system simulation in other languages. For the present study, the flight optimization system flops, a legacy aircraft synthesis software developed by nasa 14, the numerical propulsion system.
In conceptual and preliminary design, many aspects of mechanical products are most efficiently modeled for simulation using 0d1drigid entities. As an innovative propulsion technology, ultrasonic electric propulsion uep is mainly applied to nanoand microspacecrafts npss is an objectoriented, multiphysics, engineering design and simulation environment that enables development, collaboration and seamless integration of system models. However, despite its great importance, numerical methodologies for detailed investigations on marine propulsion dynamics are not yet widely covered in. Configuration management file manager developed for numerical. Numerical analysis of ducted propeller and pumpjet. An application was developed to allow users to run and view the numerical propulsion system simulation npss engine simulations from web browsers. Eai is the official distributor after prior approval from esa and the primary developer of the libraries. This paper describes the implementation and application of a new set of thermodynamic loss analysis tools in the numerical propulsion system simulation. The integral team has been working for two years to support glenns numerical propulsion system simulation npss, an effort that has received nasas prestigious turning goals into reality tgir award last april. The outer air was used due to the transient nature of the electromagnetic wave applied. Npss overview to tafw multidisciplinary simulation.
In addition, cm file manager provides tools to manage a simulation. Npss is file based and typically run through system command window. Download citation the numerical propulsion system simulation. The advantage of pumpjet over other propulsion systems can be defined by two factors including high efficiency and very low.
The development of electronics and electrotechnology enabled to put electric motors of the alternating current in the pod and to use them for the main drive of ships. The model accurately predicts the global behavior of the spacecraft propulsion system in the priming and shutdown process, and also correctly describes the transient behavior of the subsystems. This analysis tool set is intended to enable fast, accurate estimation of losses in an engine cycle model with. Lytle national aeronautics and space administration glenn research center cleveland, ohio 445 summary advances in computational technology and in physicsbased modeling are making largescale, detailed simulations of complex systems possible within the design environment. Interested parties can download a trial version or purchase an annual license either as a university person reduced rate or a full commercial license for those. Numerical propulsion system simulation sciencedirect.
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