EP3417264A1 - Verfahren zum ermitteln eines einflusses eines innen-prüfstands auf eine im innen-prüfstand betriebene gasturbine - Google Patents
Verfahren zum ermitteln eines einflusses eines innen-prüfstands auf eine im innen-prüfstand betriebene gasturbineInfo
- Publication number
- EP3417264A1 EP3417264A1 EP16834234.3A EP16834234A EP3417264A1 EP 3417264 A1 EP3417264 A1 EP 3417264A1 EP 16834234 A EP16834234 A EP 16834234A EP 3417264 A1 EP3417264 A1 EP 3417264A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas turbine
- test bench
- model
- correction parameter
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012937 correction Methods 0.000 claims description 34
- 238000005259 measurement Methods 0.000 claims description 6
- 101150034178 ISA3 gene Proteins 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 101000994167 Homo sapiens Iron-sulfur cluster assembly 1 homolog, mitochondrial Proteins 0.000 claims description 3
- 102100031404 Iron-sulfur cluster assembly 1 homolog, mitochondrial Human genes 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- -1 ISA2 Proteins 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 9
- 238000003384 imaging method Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 101000994149 Homo sapiens Iron-sulfur cluster assembly 2 homolog, mitochondrial Proteins 0.000 description 2
- 102100031428 Iron-sulfur cluster assembly 2 homolog, mitochondrial Human genes 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
Definitions
- the invention relates to a method for determining an influence of an indoor test bench on a gas turbine operated in an indoor test bench.
- the invention further relates to a computing device for use in such a method.
- an outdoor test bench outdoor test bench
- the interaction between the performance of the gas turbine and the performance of the interior test bench occurs. For this reason, it is necessary to perform a correlation between an outdoor test bench and the indoor test bench for each gas turbine.
- the correlation represents the differences between a test of the gas turbine in an indoor test bench and an outdoor test bench serving as a reference.
- the object of the present invention is to provide a method for determining an influence of an indoor test bench on a gas turbine operated in an indoor test bench, so that a separation of the influences of the indoor test bench from the performance of the gas turbine
- Another object of the invention is to provide a computing device for use in such a method.
- a first aspect of the invention relates to a method for determining an influence of an indoor test bench on a gas turbine operated in an indoor test bench, in particular an aircraft engine.
- the method comprises at least the steps of arranging the gas turbine in the interior test bench, operating the gas turbine in the interior test bench at at least one selected operating point of the gas turbine, determining at least one first measured value characterizing the gas turbine at the selected operating point and at least one inside test bench during the Operating the gas turbine at the selected operating point characterizing the second measured value by means of at least one sensor device, providing a thermodynamic model by means of a coupled to the sensor device computing means, wherein the thermodynamic model comprises at least one of the gas turbine imaging first sub-model and the interior test rig imaging second sub-model, determining at least a first model value characterizing the gas turbine at the selected operating point on the basis of the thermodynamic model and determining at least one of the inner test bars d during the operation of the gas turbine in the selected operating point characterizing second model value based on the thermodynamic model by means of the computing
- the inventive method sees the separation between state variables of the gas turbine and the Indoor test bench before.
- This separation is made possible by an analysis or simultaneous measurement of state variables of the indoor test bench and the gas turbine operated in the indoor test bench with further consideration of a thermodynamic model, which maps both the gas turbine and the indoor test bench and corresponding model values to the measured values supplies.
- the thermodynamic model is adapted to the current test conditions by varying the thermodynamic model until the model values correspond to the measured values or lie within predetermined tolerance ranges. In this way it is ensured that the thermodynamic model correctly maps the actual test run, which is expressed by the first and second correction parameters.
- the first and second correction parameters can also be used as first and second
- Scalers and express the difference between a currently analyzed state variable and the nominal state quantity. Scalers can basically characterize a ratio or a factor or a difference. Scalers expressing differences are also referred to below as delta scalers ( ⁇ ), while ratios or factors expressing scalers are also referred to as factor scaler (C). Since the thermodynamic model comprises both a first submodel for imaging the test stand and a second submodel for imaging the gas turbine, this enables a separate assessment of the test bench performance and performance of the gas turbine. This makes the analysis of the gas turbine more accurate because influences of the indoor test bench on the gas turbine output can be calculated out.
- the method according to the invention furthermore makes it possible to determine a correlation between the concrete indoor test bench and an outdoor test bench, so that the stability of the correlation can be detected by means of a trend, since the interaction between the gas turbine and the indoor test bench is resolved and reliable monitoring.
- possible state changes of the indoor test bench which have an effect on the results of the "pass-off test” or "Acceptance Test” of the gas turbine, recognized early on and avoid unnecessary measures on the gas turbine. It can be provided in principle that the method only in a selected operating point of the gas turbine is performed. Alternatively, the method may be performed for multiple or all operating points of the gas turbine.
- the first and / or the second correction parameter is determined by an analysis performance calculation.
- This allows a particularly reliable adaptation of the thermodynamic model. Suitable analysis performance calculations (“Analysis by Synthesis") are known per se to a person skilled in the art
- LPC, ⁇ -IPC, ⁇ is provided as the first correction parameter , AnLPT, ⁇ Fan, Cr
- ⁇ expresses a respective factor scaler from a measured to a calculated efficiency of a particular gas turbine component.
- Afc expresses a difference (delta scaler) between a measured and calculated flow rate fc of a particular gas turbine engine component.
- Cfc expresses a respective factor scaler from a measured to a calculated throughput fc of a particular gas turbine component.
- At least one scaler from the group ⁇ , C ⁇ Inlet, C ⁇ Exhaust, ⁇ , C ⁇ Bellmouth, w_leak_TE, AcFG nozzle, CcFG nozzle, Delta CD nozzle, Factor CD nozzle, Delta CD_bellmouth and Factor CD bellmouth is determined.
- ⁇ and delta scalers designate the pressure losses of the test bench components inlet (Inlet) leave (exhaust).
- ⁇ and ⁇ refer to factor scalers for pressure losses of the test bench components inlet (inlet) and outlet (exhaust).
- test bed components Inlet and / or Exhaust can be split into subcomponents, as a result of which, for example, a plurality of parameters ⁇ n with n> l for the respective subcomponent n can be determined.
- ⁇ ⁇ designates a delta-scaler of the pressure loss in an inlet nozzle (so-called Bellmouth), while ⁇ accordingly designates a factor scaler from a measured to a calculated pressure loss in the inlet nozzle.
- the scaler w_leak_TE denotes the leakage mass flow
- the AcFG nozzle and CcFG nozzle denote the delta scalers and the factor scaler of the thrust coefficients of a test nozzle (engine nozzle, Nozzle) of the test bench.
- At least one parameter from the group of gas turbine mass flow, temperature in the gas path, pressure in the gas path, fuel mass flow and speed of at least one shaft in the gas turbine is determined as the first measured value.
- the stated parameters can in principle be determined for one or more components of a respective gas turbine. For example, the rotational speeds of two or more waves, the temperatures in the gas path at different locations of the gas turbine and / or the pressures in the gas path at different locations of the gas turbine can be determined.
- test cell PS Cell
- test cell PS Cell
- test cell total pressure in the interior test bench
- test cell, V cell flow velocity in the interior test bench
- pressure and / or speed measurements at other locations in the interior test bench are also conceivable.
- ISA International Standard Atmosphere
- the reference model can be based on the thermodynamic model.
- thermodynamic model is adapted when determining the reference model by means of the first correction parameter and the second correction parameter.
- first correction parameter the portion of the scaler associated with the indoor bench is reset to the nominal, that is, the original, second model value.
- thermodynamic model when determining the reference model by means of the second correction parameter and not by means of the first correction parameter.
- the portion of the scaler associated with the gas turbine is reset to the nominal, that is, the original, first model value.
- a second aspect of the invention relates to a computing device for use in a method according to the first aspect of the invention.
- the computing device according to the invention can be coupled to a sensor device for exchanging first and second measured values.
- the computing device according to the invention is designed to provide a thermodynamic model, wherein the thermodynamic model comprises at least one first partial model imaging the gas turbine and a second partial model imaging the inner test bench.
- the computing device according to the invention is designed to determine, based on the thermodynamic model, at least one first model value characterizing the gas turbine at the selected operating point and at least one second model value characterizing the interior test bench during operation of the gas turbine at the selected operating point.
- the computing device according to the invention is also designed to determine at least one first correction parameter assigned to the gas turbine by varying the thermodynamic model until the first model value is within a predetermined tolerance range of the first measured value. Furthermore, the computing device according to the invention is configured to determine at least one second correction parameter associated with the interior test bench by varying the thermodynamic model until the second model value lies within a predetermined tolerance range of the second measured value.
- thermodynamic model which images both an indoor test bench and a gas turbine operated in an indoor test bench
- FIG. 2 shows a method for determining the properties (state variables) of the indoor test bench and a gas turbine operated in an indoor test bench; and
- FIG. 3 shows different calculations under reference conditions.
- thermodynamic model 10 shows a schematic diagram of a thermodynamic model 10, which images both an interior test bench 12 and a gas turbine 14 operated in the interior test bench 12 and is provided by a computing device (not shown).
- a computing device not shown
- thermodynamic model 10 images both an interior test bench 12 and a gas turbine 14 operated in the interior test bench 12 and is provided by a computing device (not shown).
- an outdoor or outdoor test bench there is an interaction between the engine performance and the test bench performance during test operation of a gas turbine 14 in the indoor or indoor test bench 12. For this reason, it is necessary to perform a correlation between the outdoor test bench and the indoor test bench 12 for each type of gas turbine or engine.
- the correlation represents the differences between a specific engine test in the indoor test bench 12 and a hypothetical engine test a reference outdoor test bench.
- thermodynamic model 10 images both the gas turbine 14 in a first sub-model and the indoor test bench 12 in a second sub-model.
- the inner test stand 12 and thus the second part model sat in the illustrated embodiment of the components atmosphere 12a, inlet (Inlet) 12b, flow branch 12c, two flow channels (Duct) 12d, inlet nozzle (Bellmouth) 12e, Nozzle 12f, Mixer 12g and Exhaust 12h together.
- the gas turbine 14 is disposed during its operation in the indoor test bench 12 between the inlet nozzle (Bellmouth) 12 e and the exhaust nozzle (Nozzle) 12 f and below the two flow channels (Duct) 12 d, which is reflected in the model 10 accordingly.
- the first submodel can itself also be divided into two or more subcomponents.
- the second shows a method for determining the properties (state variables) of the interior test bench 12 and the gas turbine 14 operated in the interior test bench 12.
- first measured values 16a may include, for example, at least one parameter from the group of temperatures in the gas path (T25, T3, T45, T49, T5, exhaust gas temperature (EGT)), fuel mass flow (WFE), engine mass flow
- second measured values are determined which characterize the interior test bench 12 during operation of the gas turbine 14 at the selected operating point.
- the measured values may comprise, for example, one or more parameters from the group Static pressure in test cell or component of indoor test bench 12 (PS_Cell), total pressure in test cell (PT_Cell), flow velocity in test cell (V_Cell) or a temperature in the test cell.
- PS_Cell Static pressure in test cell or component of indoor test bench 12
- PT_Cell total pressure in test cell
- V_Cell flow velocity in test cell
- pressure, speed and / or temperature measurements at other locations in the interior test bench 12 are also conceivable.
- thermodynamic model 10 see corresponding first and second model values for the gas turbine 14 and the indoor test bench 12 calculated. Taking into account the first and second measured values, the thermodynamic model (10) is subsequently adapted until the first and the second model value correspond to the first or second measured value or at least lie within a certain tolerance range. In other words, the model 10 is adapted to the actual measurement results in order to map the concrete test run correctly. This adjustment is expressed by correction parameters or scalers.
- step 20a at least one first correction parameter is determined for state variables of a gas turbine component.
- the first correction parameter can be obtained, for example, from the scaler group AnFan, AnLPC, Ar
- step 20b at least one second correction parameter or scaler is determined analogously to the state variables of the interior test bench 12.
- the second correction parameter (s) can be selected, for example, from the scaler group ⁇ , ⁇ ⁇ , ⁇ ,
- ⁇ , C ⁇ Bellmouth, w leak TE, AcFG nozzle and CcFG_nozzle be selected.
- three different calculations at reference conditions are performed.
- the interior test bench 12 and the gas turbine 14 are used, optionally with state variables which are currently analyzed or corrected by the corresponding correction parameters or in which the relevant scalers are reset to the nominal values of the model 10 and are not adapted to the specific measured values.
- 3 shows examples of different reference models designated ISA1, ISA2 and IS A3 under ISA conditions.
- the variant "ISA1" comprises the use of the currently analyzed reference values, that is to say the first model values of the interior test bench 12 and the currently analyzed reference values of the gas turbine 14, which are adapted via the scalers to the specific test conditions and normalized to ISA conditions that performance 22 of the concrete interior test bench 12 and of the concrete gas turbine 14 can be assessed, which would have these under reference conditions.
- the calculation variant "ISA2" comprises the use of the analyzed and normalized reference values of the interior test bench 12 and of the nominal values of the gas turbine, which are denoted by 14 ', whereby the performance 22' of the interior test bench 12 under ISA, which is uninfluenced by the specific gas turbine 14
- this calculation is relevant with a nominal gas turbine 14, that is, with a hypothetical standard engine, and the concrete interior test bench 12.
- this calculation reflects an engine test with a always the same engine 14 at the same, standardized environmental conditions again.Here changes occur, they are only caused by the indoor test bench 12.
- the calculation variant "ISA3" comprises the use of the nominal reference values of the interior test bench 12 'and the analyzed reference values of the gas turbine 14, whereby the performance 22 "of the gas turbine 14, which is uninfluenced by the concrete interior test bench 12, can be assessed under ISA conditions. This allows a particularly precise monitoring of the quality (performance) of the tested gas turbine 14, since influences of the interior test bench 12 and the current environmental conditions on the engine 14 are eliminated.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016202370.5A DE102016202370A1 (de) | 2016-02-17 | 2016-02-17 | Verfahren zum Ermitteln eines Einflusses eines Innen-Prüfstands auf eine im Innen-Prüfstand betriebene Gasturbine |
| PCT/DE2016/000438 WO2017140286A1 (de) | 2016-02-17 | 2016-12-20 | Verfahren zum ermitteln eines einflusses eines innen-prüfstands auf eine im innen-prüfstand betriebene gasturbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3417264A1 true EP3417264A1 (de) | 2018-12-26 |
Family
ID=57984745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16834234.3A Ceased EP3417264A1 (de) | 2016-02-17 | 2016-12-20 | Verfahren zum ermitteln eines einflusses eines innen-prüfstands auf eine im innen-prüfstand betriebene gasturbine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3417264A1 (de) |
| DE (1) | DE102016202370A1 (de) |
| WO (1) | WO2017140286A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2438431B (en) * | 2006-05-25 | 2008-08-20 | Rolls Royce Plc | Thrust correction |
| US7788014B2 (en) * | 2007-03-05 | 2010-08-31 | United Technologies Corporation | Process and methodology for root cause identification in gas turbine engine performance tracking |
| US20080228338A1 (en) * | 2007-03-15 | 2008-09-18 | Honeywell International, Inc. | Automated engine data diagnostic analysis |
| US20100089067A1 (en) * | 2008-10-10 | 2010-04-15 | General Electric Company | Adaptive performance model and methods for system maintenance |
| US8862433B2 (en) * | 2010-05-18 | 2014-10-14 | United Technologies Corporation | Partitioning of turbomachine faults |
| FR3019295B1 (fr) * | 2014-03-27 | 2016-03-18 | Snecma | Procede d'estimation du caractere normal ou non d'une valeur mesuree d'un parametre physique d'un moteur d'aeronef |
-
2016
- 2016-02-17 DE DE102016202370.5A patent/DE102016202370A1/de not_active Withdrawn
- 2016-12-20 WO PCT/DE2016/000438 patent/WO2017140286A1/de not_active Ceased
- 2016-12-20 EP EP16834234.3A patent/EP3417264A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| O'BRIEN: "RTO TECHNICAL REPORT 44 Performance Prediction and Simulation of Gas Turbine Engine Operation (La pr?evision des performances et la simulation du fonctionnement des turbomoteurs)", RESEARCH AND TECHNOLOGY ORGANISATION, 1 April 2002 (2002-04-01), pages 1 - 357, XP055190137, Retrieved from the Internet <URL:https://www.sto.nato.int/publications/STO%20Technical%20Reports/RTO-TR-044/TR-044-$$ALL.pdf> [retrieved on 20150519] * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016202370A1 (de) | 2017-08-17 |
| WO2017140286A1 (de) | 2017-08-24 |
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