PDF Publication Title:
Text from PDF Page: 109
Master Thesis Report Conclusion and Recommendation 8|Conclusion and Recommendation In the literature study that was conducted at the early stage of this research, it was concluded that boundary layer ingestion has the following influence on engine design and cycle performance; firstly, the engine suffers from a reduced specific thrust, reduced thrust to weight ratio as a result of in- creased mass flow, an increased fan diameter and consequently an increase in the core size of the engine. In terms of cycle performance, the engine suffers from reduced thermal efficiency but an in- crease in propulsive efficiency due to the lower exit velocity. However, the net effect is a reduction in the overall engine efficiency. The reduction in thermal efficiency is mainly a result of the lower inlet total pressure and reduced compressor efficiency caused by non-uniformities in the flow. In essence, the ingestion of the boundary layer represent a reduction in the overall efficiency of the engine cycle. However, the momentum deficit captured by the engine represent a drag reduction to the aircraft. Therefore a trade-off exists between the increase in aircraft drag reduction (increased fuel efficiency) and the decrease in overall engine efficiency (reduced fuel efficiency) as more boundary layer is ingested. Using the result of the literature review, an effort was made to investigate the influence of the non uniform inflow boundary condition on compressor efficiency. In order to do that, the original NASA Rotor 67 geometry was reconstructed and parametrised in an in house Blade Modeller. Before a full 3D simulation can be carried out, the sub-goal is to verify the 2D fitting approach of the blade profiles. As previously mentioned, the blade profiles can originate from three main sources. The first source is the blade profile generated from the original geometrical coordinate. The second source is the blade profile generated from the fitting of the blades using the geometry fitting algorithm. Finally, the last source represent the blade profile generated from the slice of the blade surface. From the 2D results, it was found that the 2D fitted and Actual point coordinate sources of profile 1265 and 1865 have the closest fit in terms of blade loading, Mach/Pressure Contour as well as their stagnation pressure loss results. However, in the case of profile 2265 and 1565, it was found that the 2d fitted and surface fitted profile have the closest fit in terms of their blade loading, Mach/Pressure Contour and stagna- tion pressure loss results. Therefore, this result suggests that it is difficult to pinpoint a particular source of error for the blade fitting procedures. However, it can be seen that minor deviation in the leading/trailing edge position and curvature of the blade profile can bring about a significant shift in the shockwave position. It can also be concluded that the BSpline surface generation algorithm gives a better fit to the 2d fitted profiles closer to the tip radius than the hub radius. For the 3D simulation results comparing the case of a uniform and non uniform inflow boundary condition, it was found that the effect of the non uniform inflow is an increase in entropy production and a decrease in isentropic efficiency. In the blade loading comparison, it is noticeable that a larger difference in the blade loading occur at locations close to the hub and tip section of the blade. This is mainly because of the greater difference in inlet total pressure as compared to the uniform boundary condition at such locations. In the blade to blade domain velocity vector comparison, it was found that the effect of the non uniform inflow is a change in the inlet incidence angle as well as the magnitude of the relative inlet velocity. This was illustrated clearly in the velocity vector plot at the 80% span 96PDF Image | Aerodynamic Design of the NASA Rotor 67 for Non Uniform Inflow
PDF Search Title:
Aerodynamic Design of the NASA Rotor 67 for Non Uniform InflowOriginal File Name Searched:
nasa-rotor-67.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |