What are these “pimples” on the jet engine for?
Clash Royale CLAN TAG#URR8PPP
When looking into the General Electric CJ 805-23B jet engine, I have discovered that all forward section of the compressor is covered by a number of near identically looking "pimples". What are these tiny devices for, what are they doing? And why only front section of the compressor has them?
jet-engine feature-identification
asked Dec 10 at 18:00
h22
5,20712864
add a comment |
When looking into the General Electric CJ 805-23B jet engine, I have discovered that all forward section of the compressor is covered by a number of near identically looking "pimples". What are these tiny devices for, what are they doing? And why only front section of the compressor has them?
jet-engine feature-identification
asked Dec 10 at 18:00
h22
5,20712864
add a comment |
When looking into the General Electric CJ 805-23B jet engine, I have discovered that all forward section of the compressor is covered by a number of near identically looking "pimples". What are these tiny devices for, what are they doing? And why only front section of the compressor has them?
jet-engine feature-identification
asked Dec 10 at 18:00
h22
5,20712864
When looking into the General Electric CJ 805-23B jet engine, I have discovered that all forward section of the compressor is covered by a number of near identically looking "pimples". What are these tiny devices for, what are they doing? And why only front section of the compressor has them?
jet-engine feature-identification
jet-engine feature-identification
asked Dec 10 at 18:00
h22
5,20712864
asked Dec 10 at 18:00
h22
5,20712864
edited Dec 10 at 21:21
asked Dec 10 at 18:00
h22
5,20712864
asked Dec 10 at 18:00
h22
5,20712864
asked Dec 10 at 18:00
h22
5,20712864
5,20712864
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that drives the gang bar rings to move all the vanes connected to it at the same time. The hydraulic actuator is usually powered with pressurized fuel and is operated by the fuel control system to keep the vanes at the optimal rotational position.
This video (thanks, @Mackk) shows how the vanes operate:
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that drives the gang bar rings to move all the vanes connected to it at the same time. The hydraulic actuator is usually powered with pressurized fuel and is operated by the fuel control system to keep the vanes at the optimal rotational position.
This video (thanks, @Mackk) shows how the vanes operate:
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
add a comment |
They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that drives the gang bar rings to move all the vanes connected to it at the same time. The hydraulic actuator is usually powered with pressurized fuel and is operated by the fuel control system to keep the vanes at the optimal rotational position.
This video (thanks, @Mackk) shows how the vanes operate:
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
add a comment |
They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that drives the gang bar rings to move all the vanes connected to it at the same time. The hydraulic actuator is usually powered with pressurized fuel and is operated by the fuel control system to keep the vanes at the optimal rotational position.
This video (thanks, @Mackk) shows how the vanes operate:
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
They are the roots of the variable stator vanes that control the direction of the airstream as it enters each compressor stage to manage and optimize the angle of attack of the compressor blades in each stage. The vanes are connected to the ring shaped gang bar and somewhere around the circumference there is an hydraulic actuator, or a series of them, that drives the gang bar rings to move all the vanes connected to it at the same time. The hydraulic actuator is usually powered with pressurized fuel and is operated by the fuel control system to keep the vanes at the optimal rotational position.
This video (thanks, @Mackk) shows how the vanes operate:
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
edited Dec 12 at 3:14
Wayne Conrad
1,18811011
1,18811011
answered Dec 10 at 19:36
John K
13.2k11442
answered Dec 10 at 19:36
John K
13.2k11442
answered Dec 10 at 19:36
John K
13.2k11442
13.2k11442
add a comment |
add a comment |
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