2006, Development of wide range compressor with variable inlet guide vane
, R&D Review of Toyota, vol.
Summary of System Retrofits System Retrofits Chilled water Install new control panels for chiller 1-3 system Remove the flow control valves and primary pumps Shut off the isolation valve on the bypass pipeline Boiler system Install two VFDs for FD fans of the two boilers in operation Install two VFDs for the feed water pumps CAV AHUs Lock the inlet guide vane
fully open, shut off the reheat valve and fully open the bypass damper permanently.
The fan inlet case and inlet guide vanes
will be developed using Resin Transfer Molding (RTM).
Actuation Systems: JSF actuation systems include the 3 bearing swivel duct actuation system at the rear of the aircraft and the variable area nozzle and inlet guide vanes
, which control airflow through the forward lift fan on the short-takeoff/vertical landing F-35.
At a second major inspection (64,000 firing hours) all the following components will be changed: combustion liners, transition pieces, first- and second-stage nozzles, first- and second-stage buckets, first-and second-stage shrouds, inlet guide vanes
, axial compressor blades (stator and rotor), and bearings.
Another benefit is improved stall margin significant enough to eliminate the need for variable inlet guide vanes
There are no hardware differences on an LM6000PC gas turbine for power generation or the mechanical drive applications, with the exception of variable inlet guide vanes
, These components are identical to those used in the DLE version and are required to allow for variable speed operation (see Figure 2).
Technically, the 737 hush kit (including the JT8D engine hush kit) is comprised of an ejector/suppressor, internal exhaust mixer, respaced inlet guide vanes
and modified reverser doors.
In a clever use of technology (a technique considered a proprietary secret by the two companies), Boeing and Pratt & Whitney worked together to add stealth to the inlet guide vanes
to mask the fan blades behind them.
Other modifications include the addition of a spacer between the inlet guide vanes
and the fan blades, and the installation of acoustical materials throughout the engine housing and tailpipe, to further reduce engine noise.
By inserting a five-inch spacer in front of the engine between the inlet guide vanes
and the fan blades, the distinctive siren-like noise is reduced.