Download or read book Investigation of Diesel Sprays Using Diffraction Based Droplet Sizing written by M. A. Coil and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of combustion in direct injection Diesel engines demands detailed understanding of the behavior of the injection. Understanding the injection involves characterizing the distribution of fuel particle sizes throughout the spray. This work studied the size distributions of sprays from commercial Diesel injectors under a series of conditions. A diffraction-based diagnostic obtained maps of local fuel droplet size information over the full spray field. Most quantitative techniques currently used in spray research provide quantitative time-ranging data at a single point in the spray field. Spatially resolved information proves more useful in studying transient sprays. The spatially resolved maps of particle size obtained in this experiment showed the reliability of the diagnostic, exhibited the transience of the fine structure of these sprays, and demonstrated the evolution of the sprays with time.
Download or read book An Investigation on Droplet Size Distribution and Evaporation of Diesel Fuel Sprays at High Injection Pressure by Using Laser Diagnostic Technique written by Yun-yi Gong and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sizing Study of Drops Produced by High Diesel Fuel Injection Pressure Sprays written by DM. Popa and published by . This book was released on 1984 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were conducted to measure droplet sizes and their distribution in high-pressure diesel fuel sprays. Fuel droplets were collected on glass plates which were treated with surface modifier. The droplets were photographed and subsequently analyzed on an image analyzer. The resultant information is used to calculate average diameter, Sauter mean diameter, etc. The degree of automation in the analysis process allows accurate measurement of a large number of photographed drops. It is estimated that the method used here allowed good measurements of small droplets on the order of 0.5 μm. Typical output of the analysis together with the validity of the technique is presented in the paper.
Download or read book Atomization and Sprays written by and published by . This book was released on 2001 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of High Injection Pressure Diesel Sprays written by Tzay-Fa Su and published by . This book was released on 1995 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Particle Size Measurement Techniques written by Julian M. Tishkoff and published by ASTM International. This book was released on 1984 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Injection Pressure Effects Upon Droplet Behavior in Transient Diesel Sprays written by Calvin C. Hung and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Full Field Diffraction Particle Sizing written by Millicent A. Coil and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Injection Pressure Effects Upon Droplet Behavior in Transient Diesel Sprays written by Calvin C. Hung and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports on the investigation of injection pressure upon the droplet behavior in transient diesel sprays. Phase/Doppler results for a Diesel spray with a maximum fuel injection line pressure of 105 MPa are compared with previously acquired droplet size and velocity measurements for a Diesel spray with an injection pressure of 21 MPa. All measurements reported here were made in atmospheric conditions at a position near the nozzle. It is shown in these results that the droplet velocity and size profiles do maintain similarity despite the substantial change in injection pressure. Specific characteristics, for example, the appearance of subtle waves in the time dependent spray data, are present in both data sets. Comparison of the measured droplet velocities and diameters with Weber number based stability criteria shows that increased injection pressure produces a higher percentage of droplets that are likely to breakup. This is mostly the result of increases in droplet velocities with higher injection pressure. The interior region of the higher pressure spray is an area extremely difficult to probe, despite the application of temporal optimization of the phase/Doppler anemometer. Inherent characteristics of the injection that affect the ability to acquire data are described, as well as some of the operational difficulties experienced in using a phase/Doppler for diesel spray droplet measurements.
Download or read book Infrared Measurements of Soot Formation and Droplet Sizes in Diesel Sprays Final Report June 6 1987 December 31 1990 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an investigation of diesel sprays using a combination of infrared wavelength optical diagnostics to probe the high droplet number density region surrounding the injector tip. Infrared wavelengths were shown to be more effective than visible or ultraviolet wavelength light at penetrating this region of the spray. This success is easily explained by the decrease in optical cross section of small diameter drops (less than 10 [mu]m) for a wavelength shift from the visible to wavelengths near 10 [mu]m. Two types of diagnostics were implemented. First, a custom manufactured, high speed infrared spectrometer was used to monitor the spectral region between 6 and 12 [mu]m in 0.5 [mu]m intervals. Spectra from this instrument, for specific locations in the combusting spray were used to monitor the development of soot in the spray. The second diagnostic technique used three collinear laser beams focussed into a 0.25 mm beam to monitor the droplet size in the spray. This measurement uses a ratio of signals to remove the droplet number density as a variable and the observed signal ratio is a direct indication of the average (using an approximate radius to the fourth power weighting function) droplet size. The experiments were performed using a shock tube to simulate the conditions typical of diesel combustion (700 to 900 K in temperature and approximately 3.0 MPa in pressure) and a custom manufactured single shot fuel injection system. Optical access in the shock tube included visible and infrared transmissive windows arranged to provide orthogonal access in two directions and perpendicular to the spray axis. The fuel injection system for this work was configured to produce approximately 20 MPa of injection pressure and produced a single injection approximately 2 ms after the injection trigger. This system could therefore be controlled to inject into the quiescent reflected region of the shock tube after the incident shock reflection from the end wall.
Download or read book DROPLET SIZE STUDY IN HIGH PRESSURE DIESEL SPRAYS AND IN DENSE GASEOUS ENVIRONMENT written by K. S. Varde and published by . This book was released on 1987 with total page 0 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 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Experimental Study of Diesel Spray Characteristics and Atomization written by Chan-Teng Chang and published by . This book was released on 1997 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diesel Fuel Spray Studies Utilizing a Caterpillar HEUI Injection System in Both Non evaporating and Evaporating Environments written by C. Paul Loeper and published by . This book was released on 2005 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diesel Spray Structure Investigation by Laser Diffraction and Sheet Illumination written by Ömer L. Gülder and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
