Abstract
The construction and useful practice of gas-turbine engine diagnosis systems depend largely on the availability of the engine mathematical models and its certain components in their structure. Utilization of multi-stage axial flow compressor performance with account for erosive wear of its parts during the operation fundamentally raises possibilities of such systems as erosive wear of flow channel, blade rings of impellers and vane rings of multi-stage compressor is a common cause of preschedule gas-turbine engine detaching from an aircraft. As evidenced by various contributions presented in the article, special emphasis on abrasive wear impact assessment on axial flow compressor performance is placed upon rotor-wing turbo-shaft engine due to their particular operating conditions. One of the main tasks in the process of mathematic simulation of an axial flow compressor blade ring is consideration of its wear type that again has a nonlinear distribution along the level of the blade. In addition, wear rate at entry and exit blade edges often have different principles. Detecting of these principles and their consideration when constructing the compressor mathematical model is a crucial task in diagnostic assessment and integrity monitoring of rotor-wing turbo-shaft engine in operation. The article represents a concept to an estimate nonlinear erosive wear effect of axial flow compressor blades on its performance based on the three-dimensional flow approach in the gas-air flow duct of compressor with a formulation of the blade rings. This approach renders possible to take into account the nonlinearity of the compressor blades wear during their operation. Through the example of the inlet compressor stage of a rotor-wing aircraft gas-turbine engine, the engine pump properties predictions with different kind of rotor blade wear have been presented.
Highlights
Utilization of multi-stage axial flow compressor performance with account for erosive wear of its parts during the operation fundamentally raises possibilities of such systems as erosive wear of flow channel, blade rings of impellers and vane rings of multi-stage compressor is a common cause of preschedule gas-turbine engine detaching from an aircraft
As evidenced by various contributions presented in the article, special emphasis on abrasive wear impact assessment on axial flow compressor performance is placed upon rotor-wing turbo-shaft engine due to their particular operating conditions
One of the main tasks in the process of mathematic simulation of an axial flow compressor blade ring is consideration of its wear type that again has a nonlinear distribution along the level of the blade
Summary
Использование характеристик многоступенчатого осевого компрессора с учётом эрозионного износа его элементов в процессе эксплуатации существенно повышает возможности таких систем, так как эрозионный износ проточной части, лопаточных венцов рабочих колёс и направляющих аппаратов многоступенчатого компрессора является частой причиной досрочного съёма газотурбинного двигателя с летательного аппарата. Одной из основных проблем при математическом моделировании лопаточного венца осевого компрессора является учет его вида износа, который, в свою очередь, имеет нелинейное распределение по высоте лопатки. Выявление данных законов и учет их при построении математической модели компрессора является важной задачей в области диагностики и контроля технического состояния вертолётного ГТД в процессе эксплуатации. Для вертолётного ГТД, ресурсные возможности которого в основном определяются совершенством и техническим состоянием компрессора, актуальным вопросом является развитие математической модели (ММ) компрессора от начала проектирования изделия до его сдачи в серийное производство и далее в эксплуатации [5]. Эффективность проектирования, доводки, отладки ГТД, контроля его технического состояния в эксплуатации определяется степенью адекватности и продуктивности используемых на этих этапах моделей
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