Research on Modeling of Propeller in a Turboprop Engine

Huang, Jiaqin; Huang, Xianghua; Zhang, Tianhong

doi:10.1515/tjj-2014-0023

Cited by 3 publications

(6 citation statements)

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“…The lifting line method (Huang et al, 2015) is used here. Following principles of single-layer model are applied (Huang et al, 2015): Control Point 1 (CP1), which is used to calculate the circulation is put on the centre of the three-quarter chord line of each panel. Control Point 2 (CP2), which is used to calculate the propeller thrust and power is put on the centre of spanwise vortex.…”

Section: Wing Modelling Based On the Lifting Line Methodsmentioning

confidence: 99%

Real-time integrated turboprop take-off model under propeller-wing interaction

Wang

Huang

2019

AEAT

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Purpose The purpose of the paper is to build a real-time integrated turboprop take-off model which fully takes the interaction between diverse parts of aircraft into consideration. Turboprops have the advantage of short take-off distance derived from propeller-wing interaction. Traditional turboprop take-off model is inappropriate because interactions between diverse parts of aircrafts are not fully considered or longer calculation time is required. To make full use of the advantage of short take-off distance, a real-time integrated take-off model is needed for analysing flight performance and developing an integrated propeller-engine-aircraft control system. Design/methodology/approach A new integrated three-degree-of-freedom take-off model is developed, which takes a modified propeller model, a wing model and the predominant propeller-wing interaction into account. The propeller model, based on strip theory, overcomes the shortage that the strip theory does not work if the angle of propeller axis and inflow velocity is non-zero. The wing model uses the lifting line method. The proposed propeller-wing interaction model simplifies the complex propeller-wing flow field. Simulations of ATR42 take-off model are conducted in the following three modes: propeller-wing interaction is ignored; influence of propeller on wing is considered only; and propeller-wing interaction is considered. Findings Comparison of take-off distances and flight parameters shows that propeller-wing interaction has a vital impact on take-off distance and flight parameters of turboprops. Practical implications The real-time integrated take-off model provides time-history flight parameters, which plays an important role in an integrated propeller-engine-aircraft control system to analyse and improve flight performance. Originality/value The real-time integrated take-off model is more precise because propeller-wing interaction is considered. Each calculation step costs less than 20 ms, which meets real-time calculation requirements. The modified propeller model overcomes the shortage of strip theory.

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Section: Wing Modelling Based On the Lifting Line Methodsmentioning

confidence: 99%

Real-time integrated turboprop take-off model under propeller-wing interaction

Wang

Huang

2019

AEAT

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“…When compared with piston engines, turboprops have more advantages due to their higher power to weight and lower fuel consumption, thereby lower environmental impact. Although the propeller used on turboprop engines has several restrictions, turboprop aircrafts have commonly employed as military and civilian transportations due to their high performance in landing and short destinations 28 . Turboprop engines consist of two main types such as single shaft and free turbine.…”

Section: System Description Regarding C‐tpementioning

confidence: 99%

“…Namely, alleviation of environmental problems such as atmospheric pollution and noise depends how much energy efficiency could be increased. 28 Also, achieving environmental goals could be possible with elevated energy efficiency quantified by means of first law of thermodynamics. When discovered combustion processes leading to inefficiency, fuel efficiency directly affecting aircraft emissions could be improved.…”

Section: Thermodynamics Background Regarding the C-tpementioning

confidence: 99%

“…Although the propeller used on turboprop engines has several restrictions, turboprop aircrafts have commonly employed as military and civilian transportations due to their high performance in landing and short destinations. 28 Turboprop engines consist of two main types such as single shaft and free turbine. At single shaft, turbine makes both compressor and propeller to turn together whereas at free turbine types, individual turbine (power or free turbine) turns to propeller; however, other turbine provides the power only compressor in the turboprop engine.…”

Section: System Description Regarding C-tpementioning

confidence: 99%

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Modeling of performance and thermodynamic metrics of a conceptual turboprop engine by comparing different machine learning approaches

Dursun

Toraman

Aygün

2022

Intl J of Energy Research

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In this study, several performance and thermodynamics metrics of a conceptual turboprop engine (C-TPE) were computed at 50 (fifty) power settings. Based on these computations, these parameters were predicted by employing artificial neural networks (ANN) and long-short term memory (LSTM) approaches. The obtained parametrically data were subjected to preprocessing for normalization. After determining model inputs to estimate the engine outputs, these data were introduced to ANN and LSTM. Then, the findings by two methods were compared with each other. In this context, fuel flow, air mass flow, exhaust velocity, compressor pressure ratio, turbine outlet temperature, and revolutions per minute (RPM) were selected as model inputs to estimate several metrics such as net thrust, specific fuel consumption (SFC), overall efficiency, exergy efficiency, and environmental effect factor (EEF) regarding the C-TPE. For modeling of the mentioned metrics, 80% and 20% of the data were used for training and testing, respectively. According to the findings of energetic and exergetic computations, SFC value of the C-TPE increases from 16.205 to 17.737 g/ kNs whereas its overall efficiency varies from 23.63% to 22.31% owing to decrement in RPM. Moreover, exergy efficiency of C-TPE remains between 23.93% and 26.2% whilst its EFF value resides between 2.66 and 3.05 throughout power settings. Finally, the modeling results indicate that coefficient of determination (R 2 ) regarding overall efficiency of C-TPE was found as 0.951867 with respect to the ANN model whereas it was calculated as 0.999906 with the proposed LSTM. It could be deduced that since LSTM is capable of providing lower the model error than the ANN for the same set of data, this method could be implemented to predict thermodynamics metrics of different kinds of gas turbine engine where obtaining data is limited.

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“…A synchrophasing system including two propellers is simulated. The component-level model of a turboprop engine (11) and the non-linear propeller model (12) are adopted. The input condition is: altitude H = 0 km, Mach number M = 0, the propeller speed N p is controlled to 100% and engine power is to the designed value.…”

Section: Simulation Of the Integrated Speed/synchrophasing Control Symentioning

confidence: 99%

Integrated speed/synchrophasing control of turboprop engine

et al. 2018

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Propeller synchrophasing control is an active method to reduce the noise and vibration of turboprop aircraft without additional weight and power. Phase control accuracy has a great influence on the noise reduction effect of synchrophasing. An integrated power/speed/synchrophasing control strategy is proposed to improve the control precision. Speed/phase control transformation logic based on a multi-blade phase plane is adopted which can take both the rapidity of speed response and phase control precision into account, but there exists switching oscillation during the mode transform process. In order to suppress the phase fluctuation due to exterior disturbance, a slave-slave control scheme is provided to take place of a master-slave scheme. Simulation results based on an integrated turboprop engine/propeller real-time non-linear model show that speed/phase integration logic can improve the response rapidity of both the speed and phase. The precision of the control system is verified to be in acceptable range.

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Research on Modeling of Propeller in a Turboprop Engine

Cited by 3 publications

References 0 publications

Real-time integrated turboprop take-off model under propeller-wing interaction

Real-time integrated turboprop take-off model under propeller-wing interaction

Modeling of performance and thermodynamic metrics of a conceptual turboprop engine by comparing different machine learning approaches

Integrated speed/synchrophasing control of turboprop engine

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