PDF Publication Title:
Text from PDF Page: 059
5.2. UNSTEADY FLOW IN A RADIAL TURBINE 49 3 are not as strong as for Case 1, depending on a more optimal inlet flow angle into the wheel. Downstream of the wheel, the centre line vortex has the direction of ro- tation opposite to direction of the rotation of the wheel when the mass flow through the turbine is high. For Case 3, this vortex is weaker as compared to the centre line vortex for Case 1, due to a more favourable flow outlet angle for Case 3. When the mass flow is low for both cases, no coherent structures are observed at the centre-line down-stream of the wheel, as shown Figure 5.12. 5.2.3. Effects of inlet perturbations The effect of different perturbations at the inlet on the performance of a radial nozzle-less turbine has been assessed. Five different inlet conditions have been considered. These are given in Table 3. For all cases, a turbulent velocity profile and the temperature are specified at the inlet boundary and different perturbations are added to this velocity profile. The mass flow at the inlet to the turbine has been kept constant (equal to 0.08144 kg/s) by varying the velocity. The temperature at the inlet has been set to 1000◦C for all cases. At the outlet, a non-reflective boundary condition is applied. The walls are assumed to be smooth and adiabatic. Table 3. Computed cases. Case 1 2 3 4 5 Turbulence intensity 0% 5% 5% 5% 5% Secondary Strength of flow secondary flow - - - - Dean 0.10 Swirl 0.28 Swirl 1.5 In Figure 5.13 the turbine are plotted for the different cases. For Case 1, no perturbations are added. Case 2 had an inlet profile with turbulent fluctuations. The turbu- lence intensity for Cases 2-5 is 5% and the turbulent fluctuations at the inlet boundary are created by the method proposed by Klein et al. (2003). Case 3 has both turbulent fluctuations and secondary flow in the velocity profile, where the secondary flow consists of a pair of counter-rotating Dean vortices, see Figure 5.14. Cases 4 and 5 have, in addition to the turbulent fluctuations, a swirling motion added, where Case 5 has the stronger swirl. The strength of the swirl at the inlet is defined as the azimuthal velocity at the edge of the inlet the axial and azimuthal velocity components at the inlet toPDF Image | Numerical computations of the unsteady flow in a radial turbine
PDF Search Title:
Numerical computations of the unsteady flow in a radial turbineOriginal File Name Searched:
radial-turbine-unsteady-flows.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 |