Pulse detonation tube with local flexural wave modifying feature
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-005/02
F02K-005/02
F02C-005/00
출원번호
US-0895368
(2010-09-30)
등록번호
US-8707674
(2014-04-29)
발명자
/ 주소
Moscinski, Michael
Rasheed, Adam
Brzek, Brian Gene
Joshi, Narendra Digamber
출원인 / 주소
General Electric Company
대리인 / 주소
Asmus, Scott J.
인용정보
피인용 횟수 :
5인용 특허 :
4
초록▼
In one embodiment, a pulse detonation tube includes a continuous base tube having a substantially uniform wall thickness. The pulse detonation tube also includes a local flexural wave modifying feature configured to locally vary a flexural wave speed such that the flexural wave speed through the pul
In one embodiment, a pulse detonation tube includes a continuous base tube having a substantially uniform wall thickness. The pulse detonation tube also includes a local flexural wave modifying feature configured to locally vary a flexural wave speed such that the flexural wave speed through the pulse detonation tube is different than an expected detonation wave speed, and/or to locally dissipate flexural wave energy.
대표청구항▼
1. A pulse detonation tube comprising: a continuous base tube having an interior surface, an exterior surface and a substantially uniform wall thickness; anda local flexural wave modifying feature configured on a downstream portion of the continuous base tube, the local flexural wave modifying featu
1. A pulse detonation tube comprising: a continuous base tube having an interior surface, an exterior surface and a substantially uniform wall thickness; anda local flexural wave modifying feature configured on a downstream portion of the continuous base tube, the local flexural wave modifying feature comprising one of: at least one sinusoidal crest and at least one sinusoidal trough configured on an exterior surface of the continuous base tube to form an undulating exterior surface and a planar interior surface, such that a first local thickness at the at least one crest is greater than the uniform wall thickness and a second local thickness at the at least one trough is less than the uniform wall thickness,one or more couplings configured to couple an exterior surface of the continuous base tube to a tube support structure, wherein the one or more couplings comprise at least one of a roller coupling or a damped coupling comprising a spring and a dashpot, ora plurality of ridges disposed on an interior surface of the continuous base tube to form a ridged interior surface and a planar exterior surface,wherein the local flexural wave modifying feature is configured to locally vary a flexural wave speed such that the flexural wave speed through the pulse detonation tube is different than an expected detonation wave speed, to locally dissipate flexural wave energy, or a combination thereof. 2. The pulse detonation tube of claim 1, wherein the local flexural wave modifying feature defines a local variation in wall thickness of the continuous base tube. 3. The pulse detonation tube of claim 2, wherein the local variation in wall thickness periodically increases and decreases along a downstream direction. 4. A pulse detonation tube comprising: a continuous base tube having an interior surface, an exterior surface and a substantially uniform wall thickness;an air valve disposed at an upstream end of the pulse detonation tube and configured to emanate an air pulse in a downstream direction;a fuel injector configured to inject fuel into each air pulse to establish a mixed fuel-air region;an ignition source disposed downstream from the air valve and configured to initiate a detonation wave by igniting the mixed fuel-air region; anda local flexural wave modifying feature positioned downstream from the ignition source, the local flexural wave modifying feature comprising one of: at least one sinusoidal crest and at least one sinusoidal trough configured on an exterior surface of the continuous base tube to form an undulating exterior surface and a planar interior surface, such that a first local thickness at the at least one crest is reater than the uniform wall thickness and a second local thickness at the at least one trough is less than the uniform wall thickness,one or more couplings configured to couple the continuous base tube to a tube support structure, wherein the one or more couplings comprise at least one of a roller coupling or a damped coupling comprising a spring and a dashpot, ora plurality of ridges disposed on an interior surface of the continuous base tube to form a ridged interior surface and a planar exterior surface,wherein the local flexural wave modifying feature is configured to locally vary a flexural wave speed such that the flexural wave speed through the pulse detonation tube is different than an expected speed of the detonation wave, to locally dissipate flexural wave energy, or a combination thereof. 5. The pulse detonation tube of claim 4, wherein the local flexural wave modifying feature defines a local variation in wall thickness of the continuous base tube. 6. A pulse detonation tube comprising: a continuous base tube having an interior surface, an exterior surface and a substantially uniform wall thickness, wherein the continuous base tube is configured to facilitate propagation of a detonation wave through a downstream region of the continuous base tube; anda local flexural wave modifying feature proximate to the downstream region, wherein the local flexural wave modifying feature comprising one of: at least one sinusoidal crest and at least one sinusoidal trough configured on an exterior surface of the continuous base tube to form an undulating exterior surface and a planar interior surface, such that a first local thickness at the at least one crest is greater than the uniform wall thickness and a second local thickness at the at least one trough is less than the uniform wall thickness,one or more couplings configured to couple the continuous base tube to a tube support structure, wherein the one or more couplings comprise at least one of a roller coupling or a damped coupling comprising a spring and a dashpot, ora plurality of ridges disposed on an interior surface of the continuous base tube to form a ridged interior surface and a planar exterior surface,wherein the local flexural wave modifying feature is configured to locally vary a flexural wave speed such that the flexural wave speed through the pulse detonation tube is different than an expected speed of the detonation wave, to locally dissipate flexural wave energy, or a combination thereof. 7. The pulse detonation tube of claim 6, wherein the local flexural wave modifying feature defines a local variation in wall thickness of the continuous base tube. 8. The pulse detonation tube of claim 6, wherein the plurality of ridges are configured to induce a deflagration to detonation transition.
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