Erscheinungsdatum: 23.01.2020, Medium: Buch, Einband: Gebunden, Titel: Hypersonic Curved Compression Inlet and Its Inverse Design, Auflage: 1. Auflage von 1920 // 1st ed. 2020, Autor: Zhang, Kunyuan, Verlag: Springer Singapore, Sprache: Englisch, Schlagworte: Maschinenbau: Strömungsmechanik // Luft // und Raumfahrttechnik // Astronautik // Raumfahrttechnik, Rubrik: Mechanik // Akustik, Seiten: 348, Informationen: HC runder Rücken kaschiert, Gewicht: 688 gr, Verkäufer: averdo
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.A two-stroke engine is a combustion engine that completes the thermodynamic cycle in two movements of the piston compared to twice that number for a four-stroke engine. This increased efficiency is accomplished by using the beginning of the compression stroke and the end of the combustion stroke to perform simultaneously the intake and exhaust (or scavenging) functions. In this way two-stroke engines often provide strikingly high specific power. Gasoline (spark ignition) versions are particularly useful in lightweight (portable) applications such as chainsaws and the concept is also used in diesel compression ignition engines in large and non-weight sensitive applications such as ships and locomotives. Invention of the two-stroke cycle is attributed to Scottish engineer Dugald Clerk who in 1881 patented his design, his engine having a separate charging cylinder. The crankcase-scavenged engine, employing the area below the piston as a charging pump, is generally credited to Englishman Joseph Day (and Frederick Cock for the piston-controlled inlet port).
The book covers brief introduction and concepts about the conventional air conditioning and evaporative cooling technologies. It presents the thermodynamic performance and relevant characteristics of direct evaporative cooling system to gain knowledge about the effects of inlet velocity of air, outdoor air temperature, cooling pad thickness and their configurations. It also explains about a developed thermodynamic model by using Logarithmic Mean Temperature Difference (LMTD) approach to predict the performance of the cooling pads. The nano-refrigerant is used in the Vapor Compression Refrigeration System (VCRS), and also in evaporative cooling combined with VCRS, then both the systems are compared. This book also helps in improving the feasibility and applicability of the developed system by decreasing the size of "evaporative cooling combined with vapour compression based air conditioning system". In this book, conventional air conditioner coupled with honeycomb cooling pads for providing better thermal comfort at a minimum operating cost in hot & dry weather is theoretically investigated.
Today, internal combustion engines in cars, trucks, motorcycles, aircraft, construction machinery and many others, most commonly use a four-stroke cycle. The four strokes refer to intake, compression, combustion (power), and exhaust strokes that occur during two crankshaft rotations per working cycle of the gasoline engine and diesel engine. The cycle begins at top dead center (TDC), when the piston is farthest away from the axis of the crankshaft. On the intake or induction stroke of the piston, the piston descends from the top of the cylinder, reducing the pressure inside the cylinder. A mixture of fuel and air is forced (by atmospheric or greater pressure) into the cylinder through the intake (inlet) port. The intake (inlet) valve (or valves) then close(s), and the compression stroke compresses the fuel air mixture. The air fuel mixture is then ignited near the end of the compression stroke, usually by a spark plug (for a gasoline or Otto cycle engine) or by the heat and pressure of compression (for a Diesel cycle or compression ignition engine). The resulting pressure of burning gases pushes the piston through the power stroke.
The general topic of the present book is control of turbomachinery. In particular, it deals with modeling and control techniques for variable speed centrifugal gas compression systems. The main objective of the study, presented in this book, is to design and implement multivariable controllers that regulate the centrifugal gas compressor and minimize fuel consumption of the gas turbine. In particular, the first aim is to design a multivariable controller that regulates the compressor discharge pressure as faster as possible, while preventing surge, by acting on the rotation speed, the inlet guide vanes and the anti surge valve. A further contribution, is the development of a control system that minimizes fuel consumption of the gas turbine at steady state.