Air-intake Performance Estimation of Air-breathing Ion Engines

A discovery was made recently that the heat release would be very efficient if it is associated with detonation phenomenon. A detonation wave imparts high pressure to the products of combustion which in turn produces large propulsive power as a result of expansion through the propulsive element. This kind of pressure gain combustor is a new idea which is going to be incorporated in the futuristic propulsive devices. A representative air breathing propulsive system configuration powered by the continuous detonation wave engine is chosen for the present investigation. This includes understanding of various processes occurring in the air intake, isolator, rotating detonation wave engine and flow expansion system. A detailed numerical modelling and simulation based on steady 1-D flow have been carried out. This analysis gave insight into the overall propulsion system performance taking into consideration of the interaction between various sub systems.

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КОНЦЕПЦІЯ СТВОРЕННЯ СИЛОВОЇ УСТАНОВКИ СІМЕЙСТВА РЕГІОНАЛЬНИХ ПАСАЖИРСЬКИХ ЛІТАКІВ АН-148/АН-158

Open Information and Computer Integrated Technologies ◽

10.32620/oikit.2019.84.02 ◽

2019 ◽

pp. 50-63

Author(s):

О. Д. Донець ◽

В. П. Іщук

Keyword(s):

Power Plant ◽

Noise Reduction ◽

Fuel Consumption ◽

Electronic System ◽

Electronic Control ◽

Level Of Automation ◽

Auxiliary Power ◽

Power Plant Control ◽

Technical Status ◽

Air Intake

The basic results of calculation and research works carried out in the process of creation of power unit of regional passenger airplanes’ family are given. The design features of the propulsion engines and engine of the auxiliary power plant are described. The aforementioned propulsion system includes propulsion engines D-436-148 and engine AI-450-MS of auxiliary power plant. In order to comply with the requirements of Section 4 of the ICAO standard (noise reduction of the aircraft in site), in part of ensuring the noise reduction of engines, when creating the power plant of the An-148/An-158 aircraft family, a single- and double-layer acoustic filler was used in the structure of the engine nacelle and air intake. The use of electronic system for automatic control of propulsion engines such as FADEC and its integration into the digital airborne aircraft complex ensured the operation of engines, included in the power plant provided with high specific fuel consumption, as well as increased the level of automation of the power plant control and monitoring, and ensured aircraft automation landing in ICAO category 3A. In addition, the use of the aforementioned electronic system, allowed to operate the power plant of the aircraft in accordance with technical status. The use of the AI-450-MS auxiliary power plant with an electronic control system such as FADEC, and the drive of the service compressor from a free turbine, eliminated the effect of changes in power and air takeoff, on the deviation of the engine from optimal mode, which also minimized the fuel consumption. The use of fuel metering system TIS-158, allowed to ensure control of its condition and assemblies, without the use of auxiliary devices, built-in control means. In the fire protection system, the use of the electronic control and monitor unit, as well as the use of digital serial code for the exchange of information between the elements of the system and the aircraft systems, has reduced the number of connections, which increased the reliability of the system and reduced its weight characteristics.

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Trans-Tasman genetic connectivity in the intertidal air-breathing slug Onchidella nigricans

Marine Ecology Progress Series ◽

10.3354/meps11926 ◽

2016 ◽

Vol 562 ◽

pp. 93-100 ◽

Cited By ~ 2

Author(s):

RA Cumming ◽

R Nikula ◽

HG Spencer ◽

JM Waters

Keyword(s):

Genetic Connectivity ◽

Air Breathing

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Application of Box-Behnken Analysis on the Optimisation of Air Intake System for a Naturally Aspirated Engine

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.2.2020.21.0602 ◽

2020 ◽

Vol 17 (2) ◽

pp. 8029-8042

Author(s):

N.S. Mustafa ◽

N.H.A. Ngadiman ◽

M.A. Abas ◽

M.Y. Noordin

Keyword(s):

Fuel Consumption ◽

Fuel Efficiency ◽

Engine Performance ◽

Fuel Price ◽

Design Expert ◽

Intake System ◽

Analysis Technique ◽

System Components ◽

Air Intake ◽

High Influence

Fuel price crisis has caused people to demand a car that is having a low fuel consumption without compromising the engine performance. Designing a naturally aspirated engine which can enhance engine performance and fuel efficiency requires optimisation processes on air intake system components. Hence, this study intends to carry out the optimisation process on the air intake system and airbox geometry. The parameters that have high influence on the design of an airbox geometry was determined by using AVL Boost software which simulated the automobile engine. The optimisation of the parameters was done by using Design Expert which adopted the Box-Behnken analysis technique. The result that was obtained from the study are optimised diameter of inlet/snorkel, volume of airbox, diameter of throttle body and length of intake runner are 81.07 mm, 1.04 L, 44.63 mm and 425 mm, respectively. By using these parameters values, the maximum engine performance and minimum fuel consumption are 93.3732 Nm and 21.3695×10-4 kg/s, respectively. This study has fully accomplished its aim to determine the significant parameters that influenced the performance of airbox and optimised the parameters so that a high engine performance and fuel efficiency can be produced. The success of this study can contribute to a better design of an airbox.

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