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2. Axial fan design - Wikipedia

   en.wikipedia.org/wiki/Axial_fan_design

   The stall zone for the single axial fan and axial fans operated in parallel are shown in the figure. [4] The Figure shows the Stall Prone Areas differently for One fan and Two fans in parallel. [4] The following can be inferred from the graph : For the Fans operated in parallel, the performance is less when compared to the individual fans.

3. Pratt & Whitney Canada JT15D - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_Canada_JT15D

   About 70% of the air passing through the fan goes down the bypass duct. The JT15D-4 and later variants use a "booster" axial stage behind the fan which runs at the same speed as the fan and directs the remaining 30% of the air into the high-pressure compressor, after which it passes into a reverse-flow annular combustor. The hot gases flow ...

4. General Electric GE9X - Wikipedia

   en.wikipedia.org/wiki/General_Electric_GE9X

   Dual rotor, axial flow, high bypass turbofan: Combustor Single annular Twin Annulus Premixing Swirler Control dual channel FADEC: Compressor: 1 fan, 3-stage LP, 11-stage HP Turbine: 2-stage HP, 6-stage LP Fan 134 in (3,404 mm) diameter, [26] 16 wide chord composite blades Length 224.0 in (5,690 mm) [Fan Spinner to TRF aft most flange] Width × ...

5. Pratt & Whitney Canada PW300 - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_Canada_PW300

   The PW 300 series has been developed in partnership with MTU who are responsible for the low pressure turbine. The first variant, the PW305A, has the following configuration and was designed with a core flexible enough for engines with take-off thrusts from 20 kN to 31 kN (4,500 to 7,000 lb): a single-stage fan driven by a three-stage low pressure turbine, supercharging a four-stage axial ...

6. Pratt & Whitney PW1000G - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_PW1000G

   For the PW1500G, N1 is the Low Pressure Spool, with a nominal speed of 10,600 RPM, with the fan geared with a ratio of 1:3.0625 (nominal speed 3461 RPM). [97] The top of climb is the most demanding point for a turbofan, where the compressor spins the fastest. [ 98 ]

7. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."