Download or read book High Bandwidth Heat Transfer Measurements in an Internal Combustion Engine Under Low Load and Motored Conditions written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer between the working fluid and the combustion chamber in an internal combustion engine is one of the most important parameters for cycle simulation and analysis. The heat transfer influences the in-cylinder pressure and temperature levels, engine efficiency, and exhaust emissions. Most of the current research carried out on combustion chambers focuses on gas temperature measurement by Coherent Anti-Stokes Raman Scattering (CARS) and heat transfer measurement by thermocouples. Heat transfer measurement by thermocouples leads to poor bandwidths and large uncertainties. A more advanced experimental technique for heat transfer measurement used in gas-turbine engine research, platinum thin film resistance thermometers, was recently employed in a single cylinder engine. Heat transfer rate measurements were successfully obtained on the piston surface and cylinder head exposed to the combustion gases. The thin film gauge system has a frequency response of around 100kHz and therefore can track the heat transfer rate changes on the piston surface and cylinder head adequately. Measurements taken with the engine motored and at low load are presented and discussed. (13 figures, 12 refs.).
Download or read book In cylinder Flame Temperature Soot Concentration and Heat Transfer Measurements in a Low heat rejection Diesel Engine written by Mark A. Mueller and published by . This book was released on 1990 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Transfer and Thermal Loading in Internal Combustion Engines written by György Sitkei and published by . This book was released on 1974 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat transfer Processes in Liquid cooled Engine Cylinders written by Benjamin Pinkel and published by . This book was released on 1945 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis based on forced-convection heat-transfer theory, similar to the analysis presented for air-cooled engines in NACA Report No. 612, is made of the cooling processes in liquid-cooled engine cylinders. Semi-empirical equations that relate the average head and barrel temperatures with the primary engine and coolant parameters are derived.
Download or read book Heat and Mass Transfer in Gasoline and Diesel Engines written by Dudley Brian Spalding and published by Core/Mechanical. This book was released on 1989 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: The editors explain that the classical formulae and techniques for predicting heat flow do not apply to the unique conditions found in reciprocating engines. They warn the reader--presumed to be aspiring designers of more efficient and less polluting engines--that although these papers, from every country where engineering is practiced, contain nearly all the available knowledge on the subject, no definitive answers emerge, no breakthroughs loom around the next equation. The topics include the transfer of engine heat and of external heat, numerical flow simulation, applications and devices, ignition and quenching, and measurement techniques. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book The Transformation of Heat in an Engine written by Kurt Neumann and published by . This book was released on 1929 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a thermodynamic basis for rating heat engines. The production of work by a heat engine rests on the operation of supplying heat, under favorable conditions, to a working fluid and then taking it away.
Download or read book Heat transfer Measurements on a Low fineness ratio Cylinder at a Mach Number of 10 4 and Angles of Attack from 0 to 90 written by Philip E. Everhart and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High output Diesel Engine Heat Transfer written by Eric Michael Gingrich and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-output diesel engine heat transfer was investigated using a single-cylinder research engine. Engine operating conditions near 30 bar IMEPg and 250 bar in-cylinder pressure were tested. This study had three primary goals. The first was to compare local piston heat transfer, based on fast-response piston surface temperature data, to global engine heat transfer based on thermodynamic data. A wireless telemetry system was used to acquire fast-response piston surface temperature data, from which heat flux was calculated. The local measurements were then spatially averaged to find total heat transfer, which agreed relatively well with the global measurements. In the second part of this research, thermal barrier coatings of various thickness and surface roughness were applied to the piston crown. Three coated pistons were tested. Coatings with higher roughness did not show any statistically significant improvement to engine performance when compared to the metal baseline piston, and produced higher filter smoke numbers. The lower roughness coated piston showed an increase of gross indicated thermal efficiency of up to 3.5 % (relative) compared to the metal baseline piston for some operating conditions. The increase in efficiency was found to correlate with additional late-cycle apparent heat release rate and a reduction in in-cylinder heat transfer. In the third part of this research, a new instantaneous spatially averaged heat transfer correlation was developed using the local heat flux data. Previous correlations are based on the correlation of Nusselt and Reynolds numbers. The new correlation included an additional term, dimensionless chemical energy release rate. The new term was derived from dimensional analysis, which should enable similitude for diesel engines. A new interpretation of the characteristic velocity, as found in the Reynolds number, was developed and included the integrated fuel mass injection rate. The existing and new correlations were calibrated to the experimental data by minimizing the least squares error. On average, the new formulation was found to match the experimental data better than the existing models.
Download or read book Advanced Combustion Technologies for Low Carbon Emissions written by Jun Li and published by Frontiers Media SA. This book was released on 2023-07-10 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Combustion and Heat Transfer in a Direct Injection Spark Ignition Engine Through Measurements of Instantaneous Combustion Chamber Surface Temperature written by Kuk-Won Cho and published by . This book was released on 2003 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Convective Heat Transfer Predictions and Experiments in an IC Engine written by Jialin Yang and published by . This book was released on 1988 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fuel Film Temperature and Thickness Measurements on the Piston Crown of a Direct injection Spark ignition Engine written by Soochan Park and published by . This book was released on 2003 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1967 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopic Measurement of Gas Temperature in Small Internal Combustion Engines written by Matthew J. Deutsch and published by . This book was released on 2016 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal Combustion Engines (ICE) revolutionized transportation at the dawn of the 20th century. Continuous refinement of the theory and design of ICE has allowed them to become so well optimized to the task of human transport that they are often taken for granted, only thought of on the rare occasion when they fail to work properly. Nobody speaks about the challenge of designing an ICE that is acceptable for the task of moving people from one place to another. Today, in the age of the remotely piloted aircraft (RPA), another opportunity arises to instigate the continuous refinement of the ICE to a novel task. Small ICE have been used to propel small model aircraft for decades, but the recent exponential growth in demand for RP A in military applications has given rise to an expectation from small ICE which far surpasses current capabilities: RPA require the ability to operate at higher altitudes, in more extreme environmental conditions, and with greater fuel efficiency than is currently possible. Small internal combustion engines, particularly those ranging in power from 1 kW to 15 kW, propel many Group 1 and Group 2 remotely piloted aircraft (RPA) platforms that play an increasingly significant role in the Department of Defense. Most engines used for defense applications are commercial off-the-shelf products, designed for hand tools and hobby aircraft. Efficiency of these engines is low and thermal loss is a significant contributor to the energy loss. Existing thermal energy loss models are based on data from much larger engines. Whether these loss models scale to the engine size class of interest, however, has not yet been established. The Small Engine Research Bench (SERB) was used previously to measure spatially and temporally averaged heat flux, as well as local, instantaneous heat flux at several external locations, for a series of small engines. This investigation will obtain time averaged crank-angle-resolved measurements of the in-cylinder gas temperature using Fourier transform infrared (FTIR) absorption thermometry. The results, coupled with heat flux measurements, will enable the validation or refinement of existing thermal energy loss models.- author's summary
Download or read book Instantaneous and Continuous Heat Flow Measurements in Internal Combustion Engines written by Thomas Rupert Schmidt and published by . This book was released on 1950 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiments and Computational Predictions of Thermal Energy Flows Occurring Within a Spark Ignited Homogeneous Charge Four Stroke Air cooled Engine written by Jay Elliott Strucel and published by . This book was released on 2000 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
