公开(公告)号：JP2003206806A

公开(公告)日：2003-07-25

申请号：JP2002008072

申请日：2002-01-16

Applicant: NAT AEROSPACE LAB

Inventor： SAITO YOSHIO ,  ENDO MASANORI ,  MATSUDA YUKIO ,  SUGIYAMA SHICHIKEI ,  TAGASHIRA TAKESHI

IPC: B64C29/00 ,  F02C1/02 ,  F02C3/10 ,  F02C3/13 ,  F02C3/14 ,  F02C6/08 ,  F02C7/36 ,  F02K3/06 ,  F02K3/075 ,  F02K3/077 ,  F02K3/11 ,  F02K3/12

Abstract: PROBLEM TO BE SOLVED: To provide a silent turbo fan engine of a core engine separation type allowing reduction of noise generated by a control propelling device by using high pressure air as working fluid of a turbine for driving a control fan for controlling a body attitude. SOLUTION: The control fan 17 constituting the control propelling device 4 disposed for controlling the body attitude of the turbo fan engine 1 of the core engine separation type is driven by an air turbine 19 using as the working fluid the high pressure air compressed by a compressor 6 of the core engine 2 and supplied through a duct 10. Speed of the working fluid discharged from the control fan 17 and the air turbine 19 is lower than that of the working fluid discharged from the propelling device 3 for propelling, and is as low as that required for attitude control, so that the noise occurring from the control propelling device 4 is reduced. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003206746A

公开(公告)日：2003-07-25

申请号：JP2002008071

申请日：2002-01-16

Applicant: NAT AEROSPACE LAB

Inventor： SAITO YOSHIO ,  ENDO MASANORI ,  MATSUDA YUKIO ,  SUGIYAMA SHICHIKEI ,  TAGASHIRA TAKESHI

IPC: B64C29/00 ,  F02C1/02 ,  F02C3/10 ,  F02C3/13 ,  F02C6/08 ,  F02C7/36 ,  F02K3/00 ,  F02K3/06 ,  F02K3/075 ,  F02K3/077 ,  F02K3/12

Abstract: PROBLEM TO BE SOLVED: To provide a multi-fan type core engine separate type turbofan engine to reduce the manufacturing cost of a turbofan engine with simple structure by using high-pressure air as a working fluid of a turbine driving a fan. SOLUTION: The turbine driving the fan 11 which constitutes a propulsion unit 3 of the multi-fan type core engine separate type turbofan engine 1 is an air turbine 13 driven by supplying a part of high-pressure air compressed by a compressor 5 of a core engine 2 through a duct 9. Since the working fluid of the air turbine 13 driving the fan 11 is not high-temperature combustion gas, it does not need to use an expensive heat-resistant material, can manufacture the propulsion unit 3 at low cost, and can simplify structure and operation control. COPYRIGHT: (C)2003,JPO

公开(公告)号：JPH10185538A

公开(公告)日：1998-07-14

申请号：JP35580996

申请日：1996-12-25

Applicant: NAT AEROSPACE LAB

Inventor： TAGASHIRA TAKESHI ,  SUGIYAMA SHICHIKEI

IPC: G01B17/00 ,  G01B21/16

Abstract: PROBLEM TO BE SOLVED: To realize an easy noncontact measurement of the dimensions of a radial or axial gap of a metallic or nonmetallic rotator even in a dirty environment. SOLUTION: The inventive equipment comprises an ultrasonic sensor 3 for generating an ultrasonic pulse and receiving the reflected wave thereof fixed in the radial direction of a rotator or the direction of an axial gap thereof, and a sensor 5 for removing the effect of a resonance wave from the output signal of the ultrasonic sensor 3 upon excitation thereof and detecting the temperature in the gap. Sound velocity in the gap variable with the temperature is then calculated and then the dimensions of the gap are calculated based the time interval between transmission and reception of the ultrasonic pulse derived from the noise-free output signal, and the calculated sound speed.