<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper presents a mathematical model for a hydromechanical fuel governor pump, to be used in parametric diagnostics. The design and operation of the governor are described. The main requirements of the model are formulated, its structure is determined, corresponding to the specifics of the diagnostic task, and assumptions to make the model simpler are presented (single-dimensional flow and absence of heat exchange). The presented model consists of idealized elements with lumped parameters (such as pressure and mass consumption of the working fluid), accounting for the compressibility of the substance and the design arrangement of the governor (presence of mechanical rests, metering orifices of complex shapes, relay switchers, etc.). Equations of elements with lumped parameters, linked by hydraulic channels in one node, are presented. The model – a system of first-order differential-algebraic equations – is solved and the parameters of the governor pump are determined for different steady-state and transient operation modes. We compare our results to the requirements for the corresponding parameters outlined in the Engineering Specifications. The model is matched to the specifications by correcting setting parameters (tightening of elastic springs, areas of throttles, etc.), and a method of initial model linearization is developed. Based on the results, we conclude that our model can be used as a diagnostic algorithm for a governor pump, at the testing and development stages, during manufacturing, repair and maintenance.</p>
</abstract>

This paper presents a mathematical model for a hydromechanical fuel governor pump, to be used in parametric diagnostics. The design and operation of the governor are described. The main requirements of the model are formulated, its structure is determined, corresponding to the specifics of the diagnostic task, and assumptions to make the model simpler are presented (single-dimensional flow and absence of heat exchange). The presented model consists of idealized elements with lumped parameters (such as pressure and mass consumption of the working fluid), accounting for the compressibility of the substance and the design arrangement of the governor (presence of mechanical rests, metering orifices of complex shapes, relay switchers, etc.). Equations of elements with lumped parameters, linked by hydraulic channels in one node, are presented. The model – a system of first-order differential-algebraic equations – is solved and the parameters of the governor pump are determined for different steady-state and transient operation modes. We compare our results to the requirements for the corresponding parameters outlined in the Engineering Specifications. The model is matched to the specifications by correcting setting parameters (tightening of elastic springs, areas of throttles, etc.), and a method of initial model linearization is developed. Based on the results, we conclude that our model can be used as a diagnostic algorithm for a governor pump, at the testing and development stages, during manufacturing, repair and maintenance.

Diagnostic Model of Aircraft Turbine Engine Governor Pump

Aircraft Engine Design Department, Faculty of Aviation Engines

National Aerospace University “Kharkiv Aviation Institute”

Transactions on Aerospace Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Diagnostic Model of Aircraft Turbine Engine Governor Pump"}

This paper presents a mathematical model for a hydromechanical fuel governor pump, to be used in parametric diagnostics. The design and operation of the...

Diagnostic Model of Aircraft Turbine Engine Governor Pump

Published Online: Jun 23, 2022

Page range: 80 - 95

Received: Jan 24, 2022

Accepted: Apr 01, 2022

DOI: https://doi.org/10.2478/tar-2022-0012

Keywords
aircraft turbine engine, hydromechanical governor, governor pump, diagnostics, model, influence coefficients

© 2022 Ihor Ohanian et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Diagnostic Model of Aircraft Turbine Engine Governor Pump

Published Online: Jun 23, 2022

Page range: 80 - 95

Received: Jan 24, 2022

Accepted: Apr 01, 2022

DOI: https://doi.org/10.2478/tar-2022-0012

Keywordsaircraft turbine engine, hydromechanical governor, governor pump, diagnostics, model, influence coefficients

© 2022 Ihor Ohanian et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
aircraft turbine engine, hydromechanical governor, governor pump, diagnostics, model, influence coefficients