CN112699549A - CDFS structure-containing aeroengine nonlinear model modeling system and modeling method - Google Patents
CDFS structure-containing aeroengine nonlinear model modeling system and modeling method Download PDFInfo
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Abstract
The invention belongs to the field of aeroengine modeling, and discloses an aeroengine nonlinear model modeling system containing a CDFS structure and a modeling method, wherein the aeroengine nonlinear model modeling system containing the CDFS structure comprises: the system comprises a CDFS information acquisition module, a culvert information acquisition module, a central control module, an connotative information acquisition module, a data analysis module, a CDFS numerical model construction module, a culvert outlet flow calculation module, a culvert outlet static pressure calculation module, a culvert inlet control module and a display module. The CDFS structure-containing aeroengine nonlinear model modeling method provided by the invention is an aeroengine modeling method with a CDFS structure, wherein in modeling, a numerical model of the CDFS and a numerical model of a front duct ejector of a rear exhaust duct of the CDFS are respectively constructed, and the real-time mixing condition of multiple airflows of the aeroengine with the CDFS structure is calculated, so that the purpose of real-time numerical simulation is achieved.
Description
Technical Field
The invention belongs to the field of aeroengine modeling, and particularly relates to a CDFS structure-containing aeroengine nonlinear model modeling system and a CDFS structure-containing aeroengine nonlinear model modeling method.
Background
At present: the aero-engine model is an important means and tool used in engine development, can express the characteristics of each part of an engine in a mathematical mode, carries out numerical simulation on the performance of the engine, effectively reduces the development cost and test risk of the engine, and has important significance for the development of the engine. The real-time model is a mathematical model capable of reflecting the working state of the engine in real time, the model requires that the time for calculating various engine states in a computer is equal to the time for working the real engine in the same state, and each step of the calculation of the real-time model is equal to the duration of the real engine. The real-time model can reflect the aerodynamic and thermodynamic parameters of the engine in real time, provides input parameters for the design of a variable cycle engine control system, provides an engine mathematical model for the semi-physical simulation test of the control system, and is beneficial to researching the change relation of the parameters in the transition state.
For aircraft engines with CDFS (core driven fan) architecture, which can vary the thermodynamic cycle by varying the geometry, dimensions, position, etc. of a plurality of adjustable components/sections, the configuration is more advanced but more complex than for aircraft engines of conventional construction. The aircraft engine with a CDFS (core engine driven fan) structure has an air exhaust duct behind the CDFS, and the existing engine real-time model has no corresponding component level model; the CDFS back air discharge and bypass airflow mixing implementation is different from the existing engine real-time model flow path, and the existing engine real-time model cannot calculate the multi-flow mixing in real time.
Through the above analysis, the problems and defects of the prior art are as follows: the existing engine real-time model has no corresponding component-level model; and the existing engine real-time model cannot calculate the blending of multiple flows in real time.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a CDFS structure-containing aeroengine nonlinear model modeling system and a CDFS structure-containing aeroengine nonlinear model modeling method.
The invention is realized in such a way that an aeroengine nonlinear model modeling system containing a CDFS structure comprises:
the system comprises a CDFS information acquisition module, a culvert information acquisition module, a central control module, an connotation information acquisition module, a data analysis module, a CDFS numerical model construction module, a culvert outlet flow calculation module, a culvert outlet static pressure calculation module, a culvert inlet control module and a display module;
the CDFS information acquisition module is connected with the central control module and used for monitoring the CDFS of the aircraft engine through a CDFS information acquisition program to obtain the CDFS information of the aircraft engine;
the external content information acquisition module is connected with the central control module and used for acquiring external content information from the CDFS information of the aircraft engine through an external content information acquisition program;
the central control module is connected with the CDFS information acquisition module, the culvert information acquisition module, the connotative information acquisition module, the data collection module, the CDFS numerical model construction module, the culvert outlet flow calculation module, the culvert outlet static pressure calculation module, the culvert inlet control module and the display module and is used for controlling each module to normally operate through the main control computer;
the connotation information acquisition module is connected with the central control module and used for acquiring connotation information from the CDFS information of the aircraft engine through a connotation information acquisition program;
the data analysis module is connected with the central control module and used for analyzing the acquired connotative data and connotative data of the aircraft engine and other CDFS data through a data analysis program to obtain a data analysis result;
the CDFS numerical model building module is connected with the central control module and used for building a CDFS numerical model according to the data analysis result through a CDFS numerical model building program;
the external culvert outlet flow calculation module is connected with the central control module and used for calculating the external culvert outlet flow through an external culvert outlet flow calculation program;
the culvert outlet static pressure calculation module is connected with the central control module and used for calculating culvert outlet static pressure through a culvert outlet static pressure calculation program;
the culvert inlet control module is connected with the central control module and is used for closing or opening the culvert inlet through a culvert inlet control program;
and the display module is connected with the central control module and is used for displaying the aircraft engine monitoring information and the CDFS numerical model through the display.
The invention also aims to provide a CDFS structure-containing aeroengine nonlinear model modeling method applying the CDFS structure-containing aeroengine nonlinear model modeling system, and the CDFS structure-containing aeroengine nonlinear model modeling method comprises the following steps:
monitoring a CDFS of the aircraft engine by using a CDFS information acquisition program through a CDFS information acquisition module to obtain CDFS information of the aircraft engine;
acquiring the foreign content information from the CDFS information of the aircraft engine by using a foreign content information acquisition program through a foreign content information acquisition module; acquiring content information from the CDFS information of the aircraft engine by using a content information acquisition program through a content information acquisition module;
thirdly, controlling each module to normally operate by using a main control computer through a central control module; analyzing the acquired connotation data, connotation data and other CDFS data of the aircraft engine by using a data analysis program through a data analysis module to obtain a data analysis result;
fourthly, constructing a CDFS numerical model by a CDFS numerical model construction module according to the data analysis result by utilizing a CDFS numerical model construction program;
calculating the culvert outlet flow by using a culvert outlet flow calculation program through a culvert outlet flow calculation module; calculating the static pressure of the culvert outlet by using a static pressure calculation program of the culvert outlet through a static pressure calculation module of the culvert outlet;
step six, closing or opening the culvert inlet by using a culvert inlet control program through a culvert inlet control module; and displaying the aircraft engine monitoring information and the CDFS numerical model by using a display through a display module.
Further, in the first step, the CDFS information of the aircraft engine further includes: and storing the acquired CDFS information of the aircraft engine into a database.
Further, in step two, the connotation information includes: the total pressure and temperature of the inlet of the culvert; the content information includes: total pressure and temperature at the inlet of the culvert.
Further, in step two, the obtaining of the connotation information from the CDFS information of the aircraft engine by the connotation information obtaining module using the connotation information obtaining program includes:
(1) receiving a data request for extracting the foreign content information, wherein the data request comprises a target internal code field and a filtering condition of a target data entity;
(2) analyzing an identification field of a main body table corresponding to the target data entity according to a data structure table corresponding to the target internal code field, wherein the main body table is a set formed by bills of the same type in the relational database;
(3) generating an executable database operation statement according to the identification fields of all the main body tables corresponding to the target data entity, the filtering field set and the value range corresponding to each filtering field;
(4) and executing the executable database operation statement in the relational database to extract the bill meeting the filtering condition as a return result corresponding to the data extracting request.
Further, the filtering condition includes a filtering field set formed by filtering fields and a value range corresponding to each filtering field, and the filtering field set is a combination formed by one or more statistical dimension fields in an entity associated field mapping table corresponding to the target internal code field.
Further, in step three, the analyzing of the connotative data, and other CDFS data of the aircraft engine collected by the data analysis module using the data analysis program includes:
1) summarizing the CDFS data, and summarizing the CDFS data according to the acquisition time;
2) classifying the summarized data to obtain a plurality of groups of CDFS data;
3) superposing, comparing and analyzing the plurality of groups of CDFS data;
4) and analyzing and mining the CDFS data, and exploring the association between the data.
Further, in step three, the overlaying, comparing and analyzing the multiple sets of CDFS data includes:
the method comprises the following steps of firstly, dividing data into a plurality of data sets;
secondly, overlapping and comparing the data in the data set;
and thirdly, analyzing the association relation among the data from different dimensions.
Further, in step four, the CDFS numerical model includes: the total inlet pressure, the total inlet temperature, the pressure ratio and the rotating speed of the CDFS are measured, and the total inlet pressure and temperature of the first external culvert and the total inlet pressure and temperature of the internal culvert are measured.
Further, in step six, the closing or opening of the culvert inlet is performed by the culvert inlet control module by using a culvert inlet control program, including: and constructing a balance equation when the selector valve is opened and closed, and opening or closing the external inlet according to the balance equation when the selector valve is opened and closed.
By combining all the technical schemes, the invention has the advantages and positive effects that: the CDFS structure-containing aeroengine nonlinear model modeling method provided by the invention is an aeroengine modeling method with a CDFS structure, wherein in modeling, a numerical model of the CDFS and a numerical model of a front duct ejector of a rear exhaust duct of the CDFS are respectively constructed, and the real-time mixing condition of multiple airflows of the aeroengine with the CDFS structure is calculated, so that the purpose of real-time numerical simulation is achieved. The method avoids the situation of iteration non-convergence caused by a tentative value, and has a good calculation result in actual numerical simulation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
FIG. 1 is a structural block diagram of a nonlinear model modeling system of an aircraft engine with a CDFS structure according to an embodiment of the present invention.
FIG. 2 is a flow chart of a method for modeling a nonlinear model of an aeroengine with a CDFS structure according to an embodiment of the present invention.
Fig. 3 is a flowchart for acquiring the foreign content information from the CDFS information of the aircraft engine by using the foreign content information acquisition program through the foreign content information acquisition module according to the embodiment of the present invention.
Fig. 4 is a flowchart illustrating analysis of the connotative data, and other CDFS data of the aircraft engine collected by the data analysis module using the data analysis program according to the embodiment of the present invention.
Fig. 5 is a flowchart of performing overlay, comparison and association analysis on multiple sets of CDFS data according to an embodiment of the present invention.
In fig. 1: 1. a CDFS information acquisition module; 2. a foreign culvert information acquisition module; 3. a central control module; 4. a content information acquisition module; 5. a data analysis module; 6. a CDFS numerical model construction module; 7. a bypass outlet flow calculation module; 8. a static pressure calculation module at the outlet of the culvert; 9. a culvert inlet control module; 10. and a display module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a CDFS structure-containing aeroengine nonlinear model modeling system and a CDFS structure-containing aeroengine nonlinear model modeling method, and the invention is described in detail below by combining the attached drawings.
As shown in fig. 1, an aeroengine nonlinear model modeling system including a CDFS structure provided by an embodiment of the present invention includes:
the system comprises a CDFS information acquisition module 1, a culvert information acquisition module 2, a central control module 3, a culvert information acquisition module 4, a data analysis module 5, a CDFS numerical model construction module 6, a culvert outlet flow calculation module 7, a culvert outlet static pressure calculation module 8, a culvert inlet control module 9 and a display module 10;
the CDFS information acquisition module 1 is connected with the central control module 3 and used for monitoring the CDFS of the aircraft engine through a CDFS information acquisition program to obtain the CDFS information of the aircraft engine;
the external content information acquisition module 2 is connected with the central control module 3 and is used for acquiring external content information from the CDFS information of the aircraft engine through an external content information acquisition program;
the central control module 3 is connected with the CDFS information acquisition module 1, the culvert information acquisition module 2, the culvert information acquisition module 4, the data summarization module 5, the CDFS numerical model construction module 6, the culvert outlet flow calculation module 7, the culvert outlet static pressure calculation module 8, the culvert inlet control module 9 and the display module 10, and is used for controlling each module to normally operate through a main control machine;
the connotation information acquisition module 4 is connected with the central control module 3 and is used for acquiring connotation information from the CDFS information of the aircraft engine through a connotation information acquisition program;
the data analysis module 5 is connected with the central control module 3 and used for analyzing the acquired connotation data, connotation data and other CDFS data of the aircraft engine through a data analysis program to obtain a data analysis result;
the CDFS numerical model building module 6 is connected with the central control module 3 and used for building a CDFS numerical model according to the data analysis result through a CDFS numerical model building program;
the culvert outlet flow calculation module 7 is connected with the central control module 3 and used for calculating culvert outlet flow through a culvert outlet flow calculation program;
the culvert outlet static pressure calculation module 8 is connected with the central control module 3 and used for calculating culvert outlet static pressure through a culvert outlet static pressure calculation program;
the culvert inlet control module 9 is connected with the central control module 3 and is used for closing or opening the culvert inlet through a culvert inlet control program;
and the display module 10 is connected with the central control module 3 and is used for displaying the aircraft engine monitoring information and the CDFS numerical model through a display.
As shown in fig. 2, the method for modeling a nonlinear model of an aeroengine with a CDFS structure according to an embodiment of the present invention includes the following steps:
s101, monitoring the CDFS of the aircraft engine by using a CDFS information acquisition program through a CDFS information acquisition module to obtain the CDFS information of the aircraft engine;
s102, acquiring connotation information from the CDFS information of the aircraft engine by using a connotation information acquisition program through a connotation information acquisition module; acquiring content information from the CDFS information of the aircraft engine by using a content information acquisition program through a content information acquisition module;
s103, controlling each module to normally operate by using a main control computer through a central control module; analyzing the acquired connotation data, connotation data and other CDFS data of the aircraft engine by using a data analysis program through a data analysis module to obtain a data analysis result;
s104, constructing a CDFS numerical model by using a CDFS numerical model construction program through a CDFS numerical model construction module according to a data analysis result;
s105, calculating the culvert outlet flow by using a culvert outlet flow calculation program through a culvert outlet flow calculation module; calculating the static pressure of the culvert outlet by using a static pressure calculation program of the culvert outlet through a static pressure calculation module of the culvert outlet;
s106, closing or opening the culvert inlet by using a culvert inlet control program through a culvert inlet control module; and displaying the aircraft engine monitoring information and the CDFS numerical model by using a display through a display module.
In step S101, the CDFS information of the aircraft engine provided in the embodiment of the present invention further includes: and storing the acquired CDFS information of the aircraft engine into a database.
In step S102, the content information provided in the embodiment of the present invention includes: the total pressure and temperature of the inlet of the culvert; the content information includes: total pressure and temperature at the inlet of the culvert.
As shown in fig. 3, in step S102, the obtaining, by the connotative information obtaining module, the connotative information from the CDFS information of the aircraft engine by using the connotative information obtaining program according to the embodiment of the present invention includes:
s201, receiving a data request for extracting foreign content information, wherein the data request comprises a target internal code field and a filtering condition of a target data entity;
s202, analyzing an identification field of a main body table corresponding to the target data entity according to a data structure table corresponding to the target internal code field, wherein the main body table is a set formed by bills of the same type in the relational database;
s203, generating an executable database operation statement according to the identification fields of all the main body tables corresponding to the target data entity, the filtering field set and the value range corresponding to each filtering field;
s204, executing the executable database operation statement in the relational database to extract the bill meeting the filtering condition as a return result corresponding to the data extracting request.
The filtering condition provided by the embodiment of the invention comprises a filtering field set formed by filtering fields and a value range corresponding to each filtering field, wherein the filtering field set is a combination formed by one or more statistical dimension fields in an entity associated field mapping table corresponding to the target internal code field.
As shown in fig. 4, in step S103, the analyzing of the collected external content data, internal content data, and other CDFS data of the aircraft engine by the data analysis module using the data analysis program according to the embodiment of the present invention includes:
s301, collecting the CDFS data, and collecting the CDFS data according to the collection time;
s302, classifying the summarized data to obtain a plurality of groups of CDFS data;
s303, overlapping, comparing and analyzing the plurality of groups of CDFS data;
s304, the CDFS data is analyzed and mined, and the correlation between the data is searched.
As shown in fig. 5, in step S103, the overlapping, comparing, and analyzing the CDFS data according to the embodiment of the present invention includes:
s401, dividing data into a plurality of data sets;
s402, overlapping and comparing the data in the data set;
and S403, analyzing the association relation between the data from different dimensions.
In step S104, the CDFS numerical model provided in the embodiment of the present invention includes: the total inlet pressure, the total inlet temperature, the pressure ratio and the rotating speed of the CDFS are measured, and the total inlet pressure and temperature of the first external culvert and the total inlet pressure and temperature of the internal culvert are measured.
In step S106, the closing or opening of the culvert import by the culvert import control module using the culvert import control program according to the embodiment of the present invention includes: and constructing a balance equation when the selector valve is opened and closed, and opening or closing the external inlet according to the balance equation when the selector valve is opened and closed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. An aeroengine nonlinear model modeling system with a CDFS structure, which is characterized by comprising:
the system comprises a CDFS information acquisition module, a culvert information acquisition module, a central control module, an connotation information acquisition module, a data analysis module, a CDFS numerical model construction module, a culvert outlet flow calculation module, a culvert outlet static pressure calculation module, a culvert inlet control module and a display module;
the CDFS information acquisition module is connected with the central control module and used for monitoring the CDFS of the aircraft engine through a CDFS information acquisition program to obtain the CDFS information of the aircraft engine;
the external content information acquisition module is connected with the central control module and used for acquiring external content information from the CDFS information of the aircraft engine through an external content information acquisition program;
the central control module is connected with the CDFS information acquisition module, the culvert information acquisition module, the connotative information acquisition module, the data collection module, the CDFS numerical model construction module, the culvert outlet flow calculation module, the culvert outlet static pressure calculation module, the culvert inlet control module and the display module and is used for controlling each module to normally operate through the main control computer;
the connotation information acquisition module is connected with the central control module and used for acquiring connotation information from the CDFS information of the aircraft engine through a connotation information acquisition program;
the data analysis module is connected with the central control module and used for analyzing the acquired connotative data and connotative data of the aircraft engine and other CDFS data through a data analysis program to obtain a data analysis result;
the CDFS numerical model building module is connected with the central control module and used for building a CDFS numerical model according to the data analysis result through a CDFS numerical model building program;
the external culvert outlet flow calculation module is connected with the central control module and used for calculating the external culvert outlet flow through an external culvert outlet flow calculation program;
the culvert outlet static pressure calculation module is connected with the central control module and used for calculating culvert outlet static pressure through a culvert outlet static pressure calculation program;
the culvert inlet control module is connected with the central control module and is used for closing or opening the culvert inlet through a culvert inlet control program;
and the display module is connected with the central control module and is used for displaying the aircraft engine monitoring information and the CDFS numerical model through the display.
2. An aeroengine nonlinear model modeling method for a CDFS structure using the aeroengine nonlinear model modeling system for a CDFS structure according to claim 1, wherein the aeroengine nonlinear model modeling method for a CDFS structure comprises the steps of:
monitoring a CDFS of the aircraft engine by using a CDFS information acquisition program through a CDFS information acquisition module to obtain CDFS information of the aircraft engine;
acquiring the foreign content information from the CDFS information of the aircraft engine by using a foreign content information acquisition program through a foreign content information acquisition module; acquiring content information from the CDFS information of the aircraft engine by using a content information acquisition program through a content information acquisition module;
thirdly, controlling each module to normally operate by using a main control computer through a central control module; analyzing the acquired connotation data, connotation data and other CDFS data of the aircraft engine by using a data analysis program through a data analysis module to obtain a data analysis result;
fourthly, constructing a CDFS numerical model by a CDFS numerical model construction module according to the data analysis result by utilizing a CDFS numerical model construction program;
calculating the culvert outlet flow by using a culvert outlet flow calculation program through a culvert outlet flow calculation module; calculating the static pressure of the culvert outlet by using a static pressure calculation program of the culvert outlet through a static pressure calculation module of the culvert outlet;
step six, closing or opening the culvert inlet by using a culvert inlet control program through a culvert inlet control module; and displaying the aircraft engine monitoring information and the CDFS numerical model by using a display through a display module.
3. The method for modeling a nonlinear model of an aircraft engine including a CDFS structure as claimed in claim 2, wherein in the first step, the CDFS information of the aircraft engine further comprises: and storing the acquired CDFS information of the aircraft engine into a database.
4. The CDFS structure-containing aeroengine nonlinear model modeling method of claim 2, wherein in step two, the connotation information comprises: the total pressure and temperature of the inlet of the culvert; the content information includes: total pressure and temperature at the inlet of the culvert.
5. The method for modeling a nonlinear model of an aircraft engine including a CDFS structure according to claim 2, wherein in step two, the obtaining of the connotation information from the CDFS information of the aircraft engine by the connotation information obtaining module using the connotation information obtaining program includes:
(1) receiving a data request for extracting the foreign content information, wherein the data request comprises a target internal code field and a filtering condition of a target data entity;
(2) analyzing an identification field of a main body table corresponding to the target data entity according to a data structure table corresponding to the target internal code field, wherein the main body table is a set formed by bills of the same type in the relational database;
(3) generating an executable database operation statement according to the identification fields of all the main body tables corresponding to the target data entity, the filtering field set and the value range corresponding to each filtering field;
(4) and executing the executable database operation statement in the relational database to extract the bill meeting the filtering condition as a return result corresponding to the data extracting request.
6. The method for modeling the nonlinear model of the aircraft engine with the CDFS structure according to claim 2, wherein the filtering conditions include a set of filtering fields formed by the filtering fields and a value range corresponding to each filtering field, and the set of filtering fields is a combination formed by one or more statistical dimension fields in an entity-associated field mapping table corresponding to the target inner code field.
7. The method for modeling a nonlinear model of an aircraft engine including a CDFS structure according to claim 2, wherein in step three, the analyzing the collected connotation data, and other CDFS data of the aircraft engine by the data analysis module using the data analysis program comprises:
1) summarizing the CDFS data, and summarizing the CDFS data according to the acquisition time;
2) classifying the summarized data to obtain a plurality of groups of CDFS data;
3) superposing, comparing and analyzing the plurality of groups of CDFS data;
4) and analyzing and mining the CDFS data, and exploring the association between the data.
8. The method for modeling a nonlinear model of an aeroengine with a CDFS structure as recited in claim 2, wherein in step three, the step of stacking, comparing and analyzing the plurality of sets of CDFS data comprises:
the method comprises the following steps of firstly, dividing data into a plurality of data sets;
secondly, overlapping and comparing the data in the data set;
and thirdly, analyzing the association relation among the data from different dimensions.
9. The method for modeling a nonlinear model of an aircraft engine including a CDFS structure as claimed in claim 2, wherein in step four, the CDFS numerical model includes: the total inlet pressure, the total inlet temperature, the pressure ratio and the rotating speed of the CDFS are measured, and the total inlet pressure and temperature of the first external culvert and the total inlet pressure and temperature of the internal culvert are measured.
10. The method for modeling a nonlinear model of an aircraft engine with a CDFS structure as recited in claim 2, wherein in step six, the closing or opening of the culvert inlet by the culvert inlet control module using a culvert inlet control program comprises: and constructing a balance equation when the selector valve is opened and closed, and opening or closing the external inlet according to the balance equation when the selector valve is opened and closed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320613A (en) * | 2021-12-16 | 2022-04-12 | 北京航空航天大学 | Engine mode conversion determination method and device, engine and aircraft |
| CN114486277A (en) * | 2022-04-07 | 2022-05-13 | 中国航发四川燃气涡轮研究院 | Dynamic mode conversion verification method based on variable cycle engine core platform |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320613A (en) * | 2021-12-16 | 2022-04-12 | 北京航空航天大学 | Engine mode conversion determination method and device, engine and aircraft |
| CN114486277A (en) * | 2022-04-07 | 2022-05-13 | 中国航发四川燃气涡轮研究院 | Dynamic mode conversion verification method based on variable cycle engine core platform |
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