Preliminary results from a market analysis of the two-stroke combustion engine industry
Abstract Market research results from groups based in the university sector can often make a significant contribution to knowledge and perspectives related to complex international industrial sectors. This is particularly true when these groups have strong linkage to the industry in question and the market research forms part of a wider research programme which involves the science and engineering of the product base under investigation. Preliminary results are therefore presented from research focused on a market analysis of the two-stroke engine industry by members of a group which is concentrating its effort in this area of the combustion engine industry. The results are intended to introduce the work in progress and to highlight several aspects which form the core of the study including application areas, patent activity and industrial company identification.
Title of Document : PERFORMANCE MEASURMENT AND SIMULATION OF A SMALL INTERNAL COMBUSTION ENGINE
Title of Document: PERFORMANCE MEASURMENT AND SIMULATION OF A SMALL INTERNAL COMBUSTION ENGINE Nathan Lee Moulton Master of Science, 2007 Directed By: Associate Professor Christopher Cadou Department of Aerospace Engineering This thesis describes performance testing of 3W Modellmotoren’s 100i-B2 which is a two-stroke gasoline engine presently being used to power a commercially produced Unmanned Air Vehicle (NAVMAR’s Mako). Since the engine was originally manufactured for use in radio controlled model aircraft, the only performance information provided by the manufacturer is its rated power output of 9.3 Hp at 8500 RPM. However, much more detailed information is required for the UAV application in order to select propellers and engine operating points that maximize the range, endurance, and load-carrying capacity. This thesis reports the first detailed characterization of this engine’s performance in the open literature that includes measurements of power output, specific fuel consumption, exhaust and cylinder head temperatures, and exhaust gas composition as a function of engine speed. The measurements show that the peak power output is 9.32 Hp at 8500 RPM with a brake specific fuel consumption of 0.797 lb/Hp-hr. The maximum BSFC of 0.668 lb/Hp-hr is achieved during 1⁄4 throttle operation at 6500 RPM with a power output level of 5.08 Hp. Exhaust gas composition measurements indicate that the carburetor controls mixture ratio effectively across the entire operating range of the engine unlike smaller model engines. A preliminary attempt was also made to simulate the engine numerically in order to identify areas where the engine design could be improved. The simulation suggests that while the engine’s performance is near optimal, it might be possible to gain additional power by decreasing the exhaust port duration. PERFORMANCE MEASUREMENT AND SIMULATION OF A SMALL INTERNAL COMBUSTION ENGINE
Introduction to Technology Transfer
For national programs working to establish sustainable agriculture in a deficit moisture area, supplemental irrigation can be a blessing. In Iran, Iraq, Jordan, Libya, and Morocco, analogous experiences can be found of increased yields and stabilized production applying supplemental irrigation — the blessings of augmented rainfall. Why? At high elevations in Turkey, for example, the average yield is 1.7 t/ha from rainfed spring wheat in the Konya Province of the Central Anatolia Region; but, it increases to 3.75 t/ha with supplemental irrigation. For rainfed barley, the average yield is 1.7 t/ha but is 4.0 t/ha with supplemental irrigation. In both cases, to achieve more than double the yields, a mere 20 mm of water was added to aid germination in the fall and, later in the spring, an application of 30 mm was added.