Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines
Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substant...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
PC Technology Center
2021-04-01
|
Series: | Eastern-European Journal of Enterprise Technologies |
Subjects: | |
Online Access: | http://journals.uran.ua/eejet/article/view/229515 |
id |
doaj-286d487afcb84a409c8a47156ed3dbf2 |
---|---|
record_format |
Article |
spelling |
doaj-286d487afcb84a409c8a47156ed3dbf22021-05-11T13:10:56ZengPC Technology CenterEastern-European Journal of Enterprise Technologies1729-37741729-40612021-04-0128 (110)233010.15587/1729-4061.2021.229515267075Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing enginesOleh Kislov0https://orcid.org/0000-0003-4814-9368Maya Ambrozhevich1https://orcid.org/0000-0003-0856-8234Mykhailo Shevchenko2https://orcid.org/0000-0002-0806-6632National Aerospace University "Kharkiv Aviation Institute"National Aerospace University "Kharkiv Aviation Institute"National Aerospace University "Kharkiv Aviation Institute"Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substantiated by the estimation error of the fuel-air ratio, which weakly affects thrust but significantly affects the specific fuel consumption. The presence of a significant error in the fuel-air ratio is explained by the use of simplified methods, which use the dependence of enthalpy as a function of mixture temperature and composition without taking into account the effect of pressure. The developed method to improve the calculation accuracy of specific fuel consumption of air-breathing engines is based on the correction of the fuel-air ratio in the combustor, determined by the existing mathematical models. The correction of the fuel-air ratio is made using the dependences of enthalpy on mixture temperature, pressure and composition. The enthalpy of the mixture is calculated through the average isobaric heat capacity obtained by integrating the isobaric heat capacity, depending on mixture temperature, pressure and composition. The calculation accuracy of the fuel-air ratio was verified by comparing it with the known experimental data on the combustion chamber of the General Electric CF6-80A engine (USA). The average calculation error of the fuel-air ratio does not exceed 3 %. The developed method was applied for correcting the specific fuel consumption for calculating the altitude-airspeed performance of the D436-148B turbofan engine (Ukraine), which made it possible to reduce the estimation error of the fuel-air ratio and specific fuel consumption to an average of 3 %http://journals.uran.ua/eejet/article/view/229515fuel-air ratiospecific fuel consumptioncombustorisobaric heat capacityair-breathing engine |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Oleh Kislov Maya Ambrozhevich Mykhailo Shevchenko |
spellingShingle |
Oleh Kislov Maya Ambrozhevich Mykhailo Shevchenko Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines Eastern-European Journal of Enterprise Technologies fuel-air ratio specific fuel consumption combustor isobaric heat capacity air-breathing engine |
author_facet |
Oleh Kislov Maya Ambrozhevich Mykhailo Shevchenko |
author_sort |
Oleh Kislov |
title |
Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
title_short |
Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
title_full |
Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
title_fullStr |
Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
title_full_unstemmed |
Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
title_sort |
development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines |
publisher |
PC Technology Center |
series |
Eastern-European Journal of Enterprise Technologies |
issn |
1729-3774 1729-4061 |
publishDate |
2021-04-01 |
description |
Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substantiated by the estimation error of the fuel-air ratio, which weakly affects thrust but significantly affects the specific fuel consumption. The presence of a significant error in the fuel-air ratio is explained by the use of simplified methods, which use the dependence of enthalpy as a function of mixture temperature and composition without taking into account the effect of pressure. The developed method to improve the calculation accuracy of specific fuel consumption of air-breathing engines is based on the correction of the fuel-air ratio in the combustor, determined by the existing mathematical models. The correction of the fuel-air ratio is made using the dependences of enthalpy on mixture temperature, pressure and composition. The enthalpy of the mixture is calculated through the average isobaric heat capacity obtained by integrating the isobaric heat capacity, depending on mixture temperature, pressure and composition. The calculation accuracy of the fuel-air ratio was verified by comparing it with the known experimental data on the combustion chamber of the General Electric CF6-80A engine (USA). The average calculation error of the fuel-air ratio does not exceed 3 %. The developed method was applied for correcting the specific fuel consumption for calculating the altitude-airspeed performance of the D436-148B turbofan engine (Ukraine), which made it possible to reduce the estimation error of the fuel-air ratio and specific fuel consumption to an average of 3 % |
topic |
fuel-air ratio specific fuel consumption combustor isobaric heat capacity air-breathing engine |
url |
http://journals.uran.ua/eejet/article/view/229515 |
work_keys_str_mv |
AT olehkislov developmentofamethodtoimprovethecalculationaccuracyofspecificfuelconsumptionforperformancemodelingofairbreathingengines AT mayaambrozhevich developmentofamethodtoimprovethecalculationaccuracyofspecificfuelconsumptionforperformancemodelingofairbreathingengines AT mykhailoshevchenko developmentofamethodtoimprovethecalculationaccuracyofspecificfuelconsumptionforperformancemodelingofairbreathingengines |
_version_ |
1721444220242231296 |