CN1731405A - Distributed simulation system for jet engine based on grid - Google Patents
Distributed simulation system for jet engine based on grid Download PDFInfo
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Abstract
The invention relates to a jet energy distribute simulating system based on griddling in the field of computer simulating domain. The system frame is positioned on the top layer of the system; the part module or interface is corresponding with the motor part module frame middle module and is used to transmit the data and control the simulating sequence between the modules; the motor part module frame is established on the simulating serve achieving frame which is used to seal the motor part and serve; the standard griddling serve interface and simulating serve achieving frame provide each network basic function to achieve the connection; the simulating serve achieving frame combines the computer basic facilities and the simulating source into a standard network computer basic facilities which is used to mask the network basic hard and software resource and to provide the standard network facilities interface to the motor part module frame.
Description
Technical field
The present invention relates to the system in a kind of Computer Simulation field, particularly relate to a kind of distributed simulation system for jet engine based on grid.
Background technology
In the jet engine design field, Computer Simulation can be brought into play the characteristics of small investment instant effect, obtains several different design proposals apace with less investment.Its design is nonlinear often and complementary.This just requires in the modeling and simulating process engine to be considered comprehensively, sets up complete, perfect model as much as possible.Object oriented calculation machine distributed simulation framework has been arranged in the prior art.
Find that through literature search people such as John A.Reed are at International GasTurbine ﹠amp to prior art; Aeroengine Congress ﹠amp; Exhibition, Indianapolis, Indiana, June 7～10, delivered article " Computational simulation of gas turbines " (gas turbine Computer Simulation) on 1999 (1999 indiana ,US hold international gas turbine and aeromotor conference).Mentioned the OO aeropropulsion system system framework-Onyx based on JAVA in this article, this system is based on stratification decomposition and standardization interface, provide a cover can the emulation gas turbine engine systems, the emulation component of subsystem and parts.On this basis, can set up new more complicated realistic model by the form of programming or graphical modeling.Yet in this system in order to solve integration problem, participate in all personnel of engine design, instrument (software hardware) is all with clear and definite in advance being fixed up as global variable of design of top-down, and the deviser of total system is not the expert of aeromotor aspect.If scheme changes in design process, designed system can not be made a response very soon by this way.Because the mutual relationship between whole architecture and software and hardware is all clearly fixed, consider the complicacy and the expense of change system what is worse, make to its any change all become actually impossible.When in the design of aeromotor that this system applies often changes to needs, the technician will face above difficulty.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of distributed simulation system for jet engine based on grid is provided, make it have the characteristics of interoperability and reusability between modularization, stratification, standardization and parametrization and realistic model.In this system, submodel has autonomy, and the deviser of submodel can select employed instrument according to the needs of oneself, the relation between defining variable and they and other devisers; But can use expansion design and simulated environment that this system provides, set up new jet engine model neatly and carry out emulation, and obtain the result.
The present invention is achieved by the following technical solutions, the present invention includes: simulation development environment structure and simulation running environment structure.
Simulation development environment structural support complication system is in all kinds of activities of construction phase, development phase generates the Various types of data information model, it can be divided into the parts modeling, two subsystems of system-level modeling system, described parts modeling, in the engine different design stage, because the difference of engine components, the difference of the simulation accuracy that requires, therefore can not provide uniform modeling tool in all design phases for all parts, the parts modeling allows different designers to use professional separately modeling tool and sets up the model of oneself, and, provide the interface of unified standard for system-level modeling with its requirement encapsulation according to mesh services and native system; Described system-level modeling system, in the engine system level modelling phase, all parts all have been packaged into the service of simulation of standard, and unified under the system-level model framework, therefore just may provide uniform modeling means for it.
The simulation running environment structure is mainly finished simulation run management, simulation time management and the emulated data management of each Simulation Application system in the operation phase, it comprises three big frameworks: system-level architecture, engine components model framework and service of simulation realize framework, specifically describe as follows:
Described system-level architecture is positioned at the top layer of total system, connects interface by the Modelica standard, and the partial model in the system-level architecture (or interface) is corresponding one by one with partial model in the engine components model framework.The engine process of simulation can virtually be set up, assemble and be controlled to system-level architecture, in the data transmission of being responsible on the total system between model, and the sequence of simulation between controlling models, manages and need not concrete partial model or subsystem found the solution.
System-level architecture can replace the realistic model of the engine components set up with corresponding " void " model (being icon) in the engine components model framework; Possesses basic graphic interface function: window management, drag and drop, mobile " void " model icon etc.The realization of these functions can reduce system developer programming burden.
Described engine components model framework directly is based upon service of simulation and realizes on the framework.Its uses JAVA language to engine components model and service thereof, encapsulates according to the requirement of grid computing.Mesh services interface and service of simulation by standard realizes that every network foundation function that framework provides realizes connecting then.
Wherein, the jet engine model bank is the important component part of engine components model framework, it is according to modularization decomposition principle and Object-Oriented Simulation method, set up system-level jet framework and the engine components model bank of starting, according to engine practical structures and principle of work, it is divided into different component models models, these modules by certain rule, are organized into the partial model storehouse with relative independentability.
Described service of simulation realizes framework, is based on VEGA software package exploitation, is the basis of whole distributed simulation system.It can be used for shielding network foundation hardware and software resource downwards by computing basic facility, various artificial resources etc. being assembled into the grid computing infrastructure of unified standard, upwards can provide standard network facility interface for the engine components model framework.
In the distributed simulation environment of setting up according to above-described structure and principle, carry out distributed simulation and can be divided into three parts: total modelling, submodel design and model solution.When model emulation is found the solution, by the system-level architecture client as required, from model bank, choose the specific solver that corresponding submodel and submodel are found the solution, set up interim distributed simulation model system.After emulation finished, this system dismissed automatically.Structure and emulation that each concrete sub-service of simulation can combine once more and carry out next model.
Three-layer architecture of the present invention is broken through the distributed simulation hierarchical structure of in the past setting up towards the computing hardware resource, increases the dirigibility of system, is subjected to the restriction of intrinsic hardware architecture when avoiding setting up new model; Stratification and modular structure have reduced the complicacy of the system that is designed.The Application Grid computing technique is the engine designer that is distributed on the different geographic position, and computing machine software/hardware resource comprehensive arrives together.The position of SHIELDING CALCULATION resource, the information of these relative bottoms of software platform and computerese or the like is for the related personnel provides a unified development environment.The present invention is engine system level model and partial model, so the component-level mode set become a holistic approach, can carry out simulation analysis to the complicated more process of engine interior.Make engine emulation on different levels more near engineering reality.Realize effectively sharing of existing resource, strengthen the ability of collaborative design and distributed simulation.
Description of drawings
Fig. 1 structured flowchart of the present invention
Fig. 2 architectural framework structural drawing of the present invention
Fig. 3 jet engine model bank of the present invention structural drawing
Fig. 4 engine system models set up process flow diagram
Fig. 5 engine distributed simulation call flow
Embodiment
The distributed simulation system for jet engine that the present invention sets up, be mainly used to describe with canonical system distribute, under the situation of networking, each ingredient of system and mutual relationship thereof.
As shown in Figure 1, the present invention includes simulation development environment structure and simulation running environment structure, simulation development environment structural support complication system is in all kinds of activities of construction phase, and the development phase generates the Various types of data information model; The simulation running environment structure is mainly finished simulation run management, simulation time management and the emulated data management of each Simulation Application system in the operation phase.
The simulation development environment structure is divided into two subsystems: (1) parts modeling, and in the engine different design stage, since the difference of engine components, the difference of the simulation accuracy that requires.Therefore can not provide uniform modeling tool in all design phases for all parts, the parts modeling allows different designers to use professional separately modeling tool and sets up the model of oneself, and, provide the interface of unified standard for system-level modeling with its requirement encapsulation according to mesh services and native system; (2) system-level modeling system, in the engine system level modelling phase, all parts all have been packaged into the service of simulation of standard, and unified under the system-level model framework, therefore just may provide uniform modeling means for it.These two subsystems also include model testing subsystem, Simulation Control subsystem respectively.Because different models may be set up by different software or program, so the model testing subsystem can test to the model of component-level respectively and revise.The simulation analysis of different partial models needs different strategy and mathematical tool, therefore also can not provide unified method for solving for all partial models; And in the system-level model that has gathered all partial models, though do not need to manage separately each concrete submodel, but need control whole simulation flow process and data transfer, so the Simulation Control subsystem provides a single Simulation Control strategy in system-level model.
As shown in Figure 2, the simulation running environment structure can be divided into three relatively independent basic frameworks: system-level architecture, engine components model framework and service of simulation realize framework.What present between this three is a kind of relation of stratification.System-level architecture is positioned at the top layer of total system, connects interface by the Modelica standard, and is corresponding one by one with partial model in the engine components model framework.System-level architecture is then in the data transmission of being responsible on the total system between model, and the sequence of simulation between controlling models, manages and need not concrete partial model or subsystem found the solution.The engine components model framework directly is based upon service of simulation and realizes on the framework.It realizes that by standard grid service interface and service of simulation every network foundation function that framework provides realizes connecting.It has constituted the main body of distributed simulation environment with system-level architecture, also is the key foundation of aeromotor emulation.Service of simulation realizes that framework is the basis of whole distributed simulation system.It can be used for shielding network foundation hardware and software resource downwards by computing basic facility, various artificial resources etc. being assembled into the grid computing infrastructure of unified standard, upwards can provide standard network facility interface for the engine components model framework.Introduce each layer structure below in detail.
(1) system-level architecture: comprised the set of the different physical unit corresponding software of engine model.It provides virtualized engine, graphic user interface and to the simulation process control strategy.The user browses model component with patterned way, model is carried out visual inquiry and assembling, and the model that has assembled is verified in system-level simulated environment.
(2) engine components model framework: comprised parts numerical value and programming model in the aero-gas turbine of being set up.These models may be the CFD models, and a FEA model or a cover are described the mathematical formulae of engine components operation.The engine components model that designs in the engine components model framework is the relatively independent interactional parts object that decomposes according to the jet engine assembly structure, rather than only realizes the pure mathematics computing module of certain algorithm function.Build up a modular partial model storehouse by these model group.
The partial model storehouse is with the hierarchical structure tissue that can react the real engine physical arrangement.From the storehouse, select suitable model according to emulation purpose, available computational resource, permissible accuracy or the like.For example in the engine initial design stage, emulation uses simple relatively zero dimension partial model (being some Basic Optical Formula) to carry out performance prediction usually.And, then can need the more model of high-order at thereafter detailed design phase.The analysis that for example has need be used and be related to three-dimensional CFD model and FEA model.From angle of assembling, can resolve into engine: parts such as air intake duct, fan, pneumatic plant, firing chamber, by-pass air duct, turbine, jet pipe and axle.According to the actual physics composition of jet engine and the physics course of work of each parts, after rationally simplifying, parts or subsystem models such as air intake duct, pneumatic plant, firing chamber, turbine and jet pipe have been set up.Use the OO power of Modelica language and realize the program module of each hierarchy of componentsization.On this basis, in conjunction with the Dymola of simulation software, finally set up a jet engine modularization simulation model library, its basic structure is seen Fig. 3.
The basic composition in partial model storehouse can be divided into following components substantially: 1. class: the most basic assembly in the model bank.Defined the most basic parameter and the variable of some in the engine components.Unless inherited or called, otherwise can not be finished any calculating; 2. function: also be one of assembly the most basic in the model bank.The key distinction of it and class is that it only finishes the mathematical computations in the emulation, does not have any physical significance; 3. basic module: being made up of various types of and function, having certain actual physics meaning, can finish certain simulation calculation, is the basic module of composition model.It generally is included in the partial model.But also individualism is as interface module; 4. partial model: almost each partial model is all corresponding with the engine components on the physical significance.Form jointly by module and class.In addition, also have some accessory parts in the model bank, as be used for record that sets up in pneumatic plant or turbine characteristic figure or the like.
(3) service of simulation realizes framework: the bottom that is positioned at total system.By setting up one " Virtual Organization " the engine designer that distributes, the computing machine software/hardware, even testing equipment etc. is comprehensive to together.Service of simulation realizes that framework has shielded the computing basic facility in the distributed simulation, as data resource, storage resources etc., various artificial resources comprise physical system model, people's behavior model, environmental model etc. and instrument resource such as modeling tool, visualization tool etc. as the model resource.
So far set up a distributed simulation system environment framework substantially towards the three-decker of jet engine object.This distributed simulation environmental system provides a Virtual Organization for the aeromotor research staff in the wide area network scope.Can easier make up existing resources satisfying the requirement of distributed simulation, and make original development and commercial software also be fully utilized.
As shown in Figure 4, be the process flow diagram that the present invention sets up the jet engine model.At first,,, engine system is carried out modularization decompose, resolve into system by unit construction according to the order that system-level demand → subsystem irrespective of size needs → component-level needs according to the principle of modularization modeling and the actual physics process of object; According to the characteristic feature and the corresponding physical law of subsystem or parts, set up mathematical model, use the Modelica language, on existing module basis, inherit or work out new program or package interface; Component models has been arranged,, set up complete module library according to the order in component models storehouse → subsystem module storehouse → system module storehouse; The module library has been arranged, just can utilize component models to be combined into the object of required research---the jet engine model.Module in the module library can customize as required, and only needs the interface of understanding module just can use module under normal conditions, does not need to understand the realization of module.Next to utilize existing module exactly, set up the model of whole object, carry out simulation calculation.According to the difference of the engine of required research, user or can directly use existing modular model perhaps further expands inheriting on original model based.On the basis of these module combinations, set up the complete model of engine then, and the parameter of each parts and the initial value of parameter in the setting model, finally so just obtained a complete realistic model of setting up according to user's needs of new engine.
After having set up the engine complete model, concrete distributed simulation process is as follows, as shown in Figure 5:
● the client, serve factory to one of registration center's inquiry, registration center returns the handle of factory's service;
● emulation user (being the jet engine system model), call an operation in the factory to set up the example of a sub-service of simulation;
● factory sets up an example of this sub-service of simulation;
● factory returns to client and emulation user to the service handle of the sub-service of simulation of this new generation;
● by the initial call between client and service, emulation user and pairing service of simulation set up that get in touch also can interoperability.
The speciality of system of the present invention is not the several different tasks of operation parallel on heterogeneous system, and is to use any suitable several resources with available to cooperate jointly.Because each work needn't operate on the same resource, if so certain particular dummy task may require special resource (as supercomputer or specific software) is to bear, and other simulation process may operate on a standard and the relatively cheap resource.Task may operate on any resource, has increased availability and the reliability used like this.
The present invention has changed and only payes attention to concrete model programming in the present distributed simulation and realize, and ignoring concrete simulation object model one-piece construction and Frame Design; Integrated multidisciplinary, multi-level realistic model, can be from different perspectives with details on the parts of the engine interior of complexity are interacted and influence each other and overall performance is studied, thereby reduce cyclic design and test number (TN), system and modular construction improvement etc. is provided support.
Claims (9)
1, a kind of distributed simulation system for jet engine based on grid comprises: simulation development environment structure and simulation running environment structure is characterized in that:
Simulation development environment structural support complication system is in all kinds of activities of construction phase, development phase generates the Various types of data information model, be divided into parts modeling, two subsystems of system-level modeling system, described parts modeling, comprise the model that each modeling tool is set up, and, provide the interface of unified standard for system-level modeling with its requirement encapsulation according to mesh services and native system; Described system-level modeling system, in the engine system level modelling phase, all parts all are packaged into the service of simulation of standard, and unified under the system-level model framework, for it provides uniform modeling means;
The simulation running environment structure is mainly finished the simulation run management of each Simulation Application system in the operation phase, simulation time management and emulated data management, it comprises: system-level architecture, engine components model framework and service of simulation realize framework, described system-level architecture, be positioned at the top layer of total system, connect interface by the Modelica standard, partial model in the system-level architecture or interface are corresponding one by one with partial model in the engine components model framework, the virtual foundation of system-level architecture energy, assembling and control engine process of simulation, in the data transmission of being responsible on the total system between model, and the sequence of simulation between controlling models; Described engine components model framework, directly being based upon service of simulation realizes on the framework, engine components model and service thereof are encapsulated according to the requirement of grid computing, realize that with service of simulation every network foundation function that framework provides realizes connection by the mesh services interface of standard then; Described service of simulation realizes framework, computing basic facility, various artificial resource are assembled into the grid computing infrastructure of unified standard, be used for shielding network foundation hardware and software resource downwards, upwards provide standard network facility interface for the engine components model framework.
2, the distributed simulation system for jet engine based on grid according to claim 1, it is characterized in that, described system-level architecture can be icon replaces the engine components set up in the engine components model framework a realistic model with corresponding " void " model; Possesses basic graphic interface function: window management, drag and drop, mobile " void " model icon.
3, according to claim 1 or 2 described distributed simulation system for jet engine based on grid, it is characterized in that, described system-level architecture, comprised the set of each physical unit corresponding software model of engine, it provides virtualized engine, graphic user interface and to the simulation process control strategy, and the user browses model component with patterned way, model is carried out visual inquiry and assembling, and the model that has assembled is verified in system-level simulated environment.
4, distributed simulation system for jet engine based on grid according to claim 1, it is characterized in that, in the described engine components model framework, comprise the modular partial model of jet engine storehouse, the jet engine model bank is according to modularization decomposition principle and Object-Oriented Simulation method, set up system-level jet framework and the engine components model bank of starting, according to engine practical structures and principle of work, it is divided into a plurality of component models models, these modules are made into the partial model storehouse with relative independentability by rule sets, it has comprised parts numerical value and programming model in the aero-gas turbine of being set up, these models are CFD models, a FEA model or a cover are described the mathematical formulae of engine components operation, the engine components model that designs in the engine components model framework.
5, distributed simulation system for jet engine based on grid according to claim 4, it is characterized in that, described partial model storehouse, be with the hierarchical structure tissue that can react the real engine physical arrangement, according to the emulation purpose, available computational resource, permissible accuracy is preference pattern from the storehouse, in the engine initial design stage, emulation uses the zero dimension partial model to carry out performance prediction, at detailed design phase thereafter, then use the more model of high-order, from angle of assembling engine is resolved into lower member: air intake duct, fan, pneumatic plant, the firing chamber, by-pass air duct, turbine, jet pipe and axle, according to the actual physics composition of jet engine and the physics course of work of each parts, after rationally simplifying, set up each parts or subsystem model, use the program module that each hierarchy of componentsization realized in the Modelica language, on this basis, in conjunction with the Dymola of simulation software, finally set up a jet engine modularization simulation model library.
6, the distributed simulation system for jet engine based on grid according to claim 4, it is characterized in that, described partial model storehouse, its basic composition is divided into following components: 1. class: the most basic assembly in the model bank, defined the most basic parameter and the variable in the engine components, unless inherited or called, otherwise can not be finished any calculating; 2. function: also be one of assembly the most basic in the model bank, it only finishes the mathematical computations in the emulation; 3. basic module: being made up of various types of and function, having the actual physics meaning, can finish simulation calculation, is the basic module of composition model, and it is included in the partial model, perhaps individualism; 4. partial model: each partial model is all corresponding with the engine components on the physical significance, is made up of jointly module and class: also have accessory part in the partial model storehouse.
7, the distributed simulation system for jet engine based on grid according to claim 1, it is characterized in that, described service of simulation realizes framework, be based on VEGA software package exploitation, by setting up one " Virtual Organization " the engine designer that distributes, the computing machine software/hardware, even testing equipment is comprehensively to together, service of simulation realizes that framework has shielded the computing basic facility in the distributed simulation, various artificial resource and instrument resource.
8, the distributed simulation system for jet engine based on grid according to claim 1, it is characterized in that, described parts modeling, two subsystems of system-level modeling system also include model testing subsystem, Simulation Control subsystem respectively, the model testing subsystem is tested to the model of component-level respectively and is revised, Simulation Control subsystem controls whole simulation flow process and data transfer provide a single simulation control method in system-level model.
9, the distributed simulation system for jet engine based on grid according to claim 1, it is characterized in that, when carrying out distributed simulation, be divided into three parts: total modelling, submodel design and model solution, when model emulation is found the solution, by the system-level architecture client as required, from model bank, choose the specific solver that corresponding submodel and submodel are found the solution, set up interim distributed simulation model system, after emulation finishes, this system dismisses automatically, structure and emulation that each concrete sub-service of simulation can combine once more and carry out next model.
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| CN107451331A (en) * | 2017-06-28 | 2017-12-08 | 中北大学 | A kind of supercharged diesel engine course of work three-dimensional emulation method |
| CN107451331B (en) * | 2017-06-28 | 2021-05-28 | 中北大学 | Three-dimensional simulation method for working process of supercharged diesel engine |
| CN107506446A (en) * | 2017-08-23 | 2017-12-22 | 京东方科技集团股份有限公司 | Nonproductive poll confirmation method and system |
| CN109583104A (en) * | 2018-12-04 | 2019-04-05 | 中国核动力研究设计院 | A kind of nuclear reactor thermal-hydraulic simulation framework method based on modelica specification |
| CN109583104B (en) * | 2018-12-04 | 2022-02-22 | 中国核动力研究设计院 | Nuclear reactor thermal hydraulic simulation architecture method based on modelica specification |
| CN112115035A (en) * | 2020-09-10 | 2020-12-22 | 苏州骏腾智能科技有限公司 | System-level simulation modeling platform in 5G environment |
| CN113553788A (en) * | 2021-07-23 | 2021-10-26 | 中国航发贵阳发动机设计研究所 | Simulation calculation method for ventilation capacity of aircraft engine lubricating system |
| WO2024031975A1 (en) * | 2022-08-12 | 2024-02-15 | 华为云计算技术有限公司 | Simulation method and physics engine |
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