Starter power evaluation method and device based on core engine test bed
By using the imported total temperature and flow parameters to calculate the starter power through the core engine test bench, the problem of accuracy in starter power assessment is solved, costs are saved, and engine starting performance is ensured.
Patent Information
- Application Number
- CN202511585046.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2025-12-16
AI Technical Summary
In aircraft engine bench testing, the starter power cannot be accurately assessed, leading to engine start failure or overheating problems. In addition, the cost of building an additional starter test bench is high, resulting in serious waste of resources.
By using the inlet total temperature, inlet air flow rate, and compressor and turbine outlet total temperature parameters of the core engine test bench, and combining them with formulas, the power of the compressor, turbine, and starter can be calculated to achieve an accurate assessment of the starter power.
It enables accurate evaluation of starter power on existing test benches, saving the high cost of building additional test benches, avoiding resource waste, and ensuring engine starting performance.
Smart Images
Figure CN121141184A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of aero-engine testing technology, specifically relating to a starter power evaluation method and device based on a core engine test bench. Background Technology
[0002] During aircraft engine bench testing, engine start-up failures or overheating problems occasionally occur. During troubleshooting, we can only check the engine itself and cannot determine whether the power provided by the starter motor meets the requirements.
[0003] Generally, the starter motor installed in an aircraft engine cannot be measured through engine bench testing. Starter motor power requires a dedicated test bench for measurement. However, constructing an additional starter motor test bench for power measurement incurs significant additional costs, and its infrequent use is wasteful of resources. Therefore, currently, starter motor power is only tested upon delivery to the factory. Before assembly into the engine, it is not retested upon arrival at the factory, making it impossible to control the starter motor's power status and guarantee the engine's starting performance. Summary of the Invention
[0004] To address the aforementioned issues, this application provides a starter power evaluation method and apparatus based on a core engine test bench. By utilizing existing test benches and measurable test parameters, the starter power can be accurately evaluated.
[0005] The first aspect of this application provides a starter power evaluation method based on a core engine test bench, mainly including:
[0006] The starter power evaluation is carried out using a core engine test bench, wherein the core engine is in a cold-running state. The method includes:
[0007] Step S1: Determine the compressor power based on the total inlet temperature, inlet air flow rate, and total compressor outlet temperature of the core machine test bench;
[0008] Step S2: Determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench;
[0009] Step S3: Determine the starter power based on the compressor power and turbine power.
[0010] Preferably, the step S1 further includes:
[0011] Step S0: Continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
[0012] Preferably, in step S1, the compressor power is calculated according to the following formula. :
[0013] ;
[0014] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
[0015] Preferably, in step S2, the turbine power is calculated according to the following formula. :
[0016] ;
[0017] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
[0018] Preferably, in step S3, the starter power is calculated according to the following formula. :
[0019] ;
[0020] in, For compressor power, For turbine power, For the mechanical efficiency of the connecting shaft.
[0021] A second aspect of this application provides a starter power evaluation device based on a core engine test bench, wherein the starter power evaluation is conducted using the core engine test bench, and the core engine is in a cold-running state. The device includes:
[0022] The compressor power determination module is used to determine the compressor power based on the inlet total temperature, inlet air flow rate and compressor outlet total temperature of the core machine test bench.
[0023] The turbine power determination module is used to determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench;
[0024] The starter power determination module is used to determine the starter power based on the compressor power and turbine power.
[0025] Preferably, the device further includes:
[0026] The engine speed change rate monitoring module is used to continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
[0027] Preferably, in the compressor power determination module, the compressor power is calculated according to the following formula. :
[0028] ;
[0029] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
[0030] Preferably, in the turbine power determination module, the turbine power is calculated according to the following formula. :
[0031] ;
[0032] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
[0033] Preferably, in the starter power determination module, the starter power is calculated according to the following formula. :
[0034] ;
[0035] in, For compressor power, For turbine power, For the mechanical efficiency of the connecting shaft.
[0036] This application, through existing core engine test benches and conventional measurement parameters, combined with core engine testing, achieves accurate evaluation of starter power, saving the high costs of building additional starter power test benches, avoiding the waste of test drive resources, and enabling control over the starter power status, thus laying the foundation for ensuring engine starting performance. Attached Figure Description
[0037] Figure 1 This is a flowchart of a preferred embodiment of the starter power evaluation method based on the core engine test bench in this application. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0039] The first aspect of this application provides a starter power evaluation method based on a core engine test bench. The starter power evaluation is conducted using a core engine test bench, wherein the core engine is in a cold-running state. Figure 1 As shown, the method includes:
[0040] Step S1: Determine the compressor power based on the total inlet temperature, inlet air flow rate, and total compressor outlet temperature of the core machine test bench;
[0041] Step S2: Determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench;
[0042] Step S3: Determine the starter power based on the compressor power and turbine power.
[0043] This application determines the starter power based on compressor power and turbine power. In order to obtain the core engine flow rate to calculate the compressor power and turbine power, it is necessary to conduct starter power evaluation using a core engine test bench. In addition, b) to avoid the influence of the accuracy of bench fuel supply measurement, the starter power evaluation is conducted under the condition of core engine cold operation (no fuel supply, only starter rotation).
[0044] In some alternative implementations, step S1 is further preceded by:
[0045] Step S0: Continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
[0046] In this embodiment, to avoid the influence of engine rotational inertia dispersion, the evaluation is carried out after the cold running speed has stabilized, that is, the core engine compressor and turbine power are balanced. To this end, this embodiment continuously monitors the engine cold running speed change rate. When the engine cold running speed change rate is lower than a preset value, the cold running speed is considered to be stable.
[0047] In some alternative implementations, in step S1, the compressor power is calculated according to the following formula. :
[0048] ;
[0049] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
[0050] In this embodiment, the enthalpy of each unit flow rate at the set temperature can be obtained by looking up the aerodynamic parameter table.
[0051] In some alternative implementations, in step S2, the turbine power is calculated according to the following formula. :
[0052] ;
[0053] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
[0054] In this embodiment, b) since the core engine is in a cold operating state and there is no fuel supply in the combustion chamber, the temperature of the turbine inlet is equal to the temperature of the compressor inlet. Therefore, the turbine power can be calculated using the above formula.
[0055] In some alternative implementations, in step S3, the starter power is calculated according to the following formula. :
[0056] ;
[0057] in, For compressor power, For turbine power, The mechanical efficiency of the connecting shaft is given based on empirical values.
[0058] This application, through existing core engine test benches and conventional measurement parameters, combined with core engine testing, achieves accurate evaluation of starter power, saving the high costs of building additional starter power test benches and avoiding the waste of test drive resources. In addition, by adopting the technical solution of this application, the power status of the starter can be controlled, laying the foundation for ensuring the starting performance of the engine.
[0059] A second aspect of this application provides a starter power evaluation device based on a core engine test bench, corresponding to the above-described method. The device uses the core engine test bench to evaluate starter power, wherein the core engine is in a cold-running state. The device includes:
[0060] The compressor power determination module is used to determine the compressor power based on the inlet total temperature, inlet air flow rate and compressor outlet total temperature of the core machine test bench.
[0061] The turbine power determination module is used to determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench;
[0062] The starter power determination module is used to determine the starter power based on the compressor power and turbine power.
[0063] In some alternative embodiments, the apparatus further includes:
[0064] The engine speed change rate monitoring module is used to continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
[0065] In some alternative embodiments, the compressor power determination module calculates the compressor power according to the following formula. :
[0066] ;
[0067] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
[0068] In some alternative embodiments, the turbine power is calculated in the turbine power determination module according to the following formula. :
[0069] ;
[0070] in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
[0071] In some alternative embodiments, the starter power determination module calculates the starter power according to the following formula. :
[0072] ;
[0073] in, For compressor power, For turbine power, For the mechanical efficiency of the connecting shaft.
[0074] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A method for evaluating starter power based on a core engine test bench, characterized in that, The starter power evaluation is carried out using a core engine test bench, wherein the core engine is in a cold-running state. The method includes: Step S1: Determine the compressor power based on the total inlet temperature, inlet air flow rate, and total compressor outlet temperature of the core machine test bench; Step S2: Determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench; Step S3: Determine the starter power based on the compressor power and turbine power.
2. The starter power evaluation method based on a core engine test bench as described in claim 1, characterized in that, Step S1 further includes: Step S0: Continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
3. The starter power evaluation method based on a core machine test bench as described in claim 1, characterized in that, In step S1, the compressor power is calculated according to the following formula. : ； in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
4. The starter power evaluation method based on a core engine test bench as described in claim 1, characterized in that, In step S2, the turbine power is calculated according to the following formula. : ； in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
5. The starter power evaluation method based on a core engine test bench as described in claim 1, characterized in that, In step S3, the starter power is calculated according to the following formula. : ； in, For compressor power, For turbine power, For the mechanical efficiency of the connecting shaft.
6. A starter power evaluation device based on a core engine test bench, characterized in that, A starter power evaluation was conducted using a core engine test bench, wherein the core engine was in a cold-running state. The test bench included: The compressor power determination module is used to determine the compressor power based on the inlet total temperature, inlet air flow rate and compressor outlet total temperature of the core machine test bench. The turbine power determination module is used to determine the turbine power based on the inlet total temperature, inlet air flow rate and turbine outlet total temperature of the core machine test bench; The starter power determination module is used to determine the starter power based on the compressor power and turbine power.
7. The starter power evaluation device based on a core engine test bench as described in claim 6, characterized in that, The device further includes: The engine speed change rate monitoring module is used to continuously monitor the engine speed change rate during cold operation until the speed change rate is lower than a preset value.
8. The starter power evaluation device based on a core engine test bench as described in claim 6, characterized in that, In the compressor power determination module, the compressor power is calculated according to the following formula. : ； in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, The total temperature at the turbine outlet. The total temperature of the imported goods.
9. The starter power evaluation device based on a core engine test bench as described in claim 6, characterized in that, In the turbine power determination module, the turbine power is calculated according to the following formula. : ； in, For the inlet air flow rate, The gas temperature per unit flow rate is Enthalpy value, The gas temperature per unit flow rate is Enthalpy value, This refers to the total temperature at the compressor outlet. The total temperature of the imported goods.
10. The starter power evaluation device based on a core engine test bench as described in claim 6, characterized in that, In the starter power determination module, the starter power is calculated according to the following formula. : ； in, For compressor power, For turbine power, For the mechanical efficiency of the connecting shaft.