A computational study of thrust vectoring control using dual throat nozzle

Shin, Choon Sik; Kim, Heuy Dong; Setoguchi, Toshiaki; Matsuo, Shigeru

doi:10.1007/s11630-010-0413-x

Cited by 30 publications

(25 citation statements)

References 3 publications

(2 reference statements)

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“…In addition, fixed aperture nozzles would enhance low-observable integration aspects by eliminating moving flaps, discontinuities, and gaps [2], For decades the fluidic thrust vectoring nozzles have evolved four main types as: shock vectoring control (SVC) [4], counterflow [5], throat shift (TS) [6,7], and dual throat nozzle (DTN) [8], Each method uses the secondary air source in a differ ent way. The main results are discussed briefly as following.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Investigations of a Bypass Dual Throat Nozzle

Guo

2014

Journal of Engineering for Gas Turbines and Power

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The bypass dual throat nozzle (BDTN) is a new kind o f fluidic vec toring nozzle. A bypass is set between the upstream convergent section and upstream minimum area based on the conventional dual throat nozzle (DTN). The BDTN shows a minimum or even no penalty on the nozzle's thrust performance, while it would be able to produce steady and efficient vectoring deflection similar to the conventional DTN. A BDTN model has been designed and sub jected to experimental and computational study. The main results show that: (1) BDTN does not consume any secondary injection from the other part of the engine, while it can produce steady and efficient vectoring deflection. (2) Under the same condition, it can provide the maximum thrust vectoring efficiency o f all the known fluidic thrust vectoring concepts reported in the literature. (3) The thrust vector angle is also greater than that of the conventional DTN that has been reported up to now. Especially, under NPR = 10, the thrust vector angle o f BDTN can reach 21.3 deg. (4) For a wide NPR range from 2 to 10, the BDTN generates the best thrust vectoring performance under NPR =4. Above all, the BDTN is well suited to produce vectored thrust for nozzles.

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Section: Introductionmentioning

confidence: 99%

“…DTN has been developed based on the throat shifting method by NASA Langley Research Center in 2003 [8]. The recessed cav ity section is located between upstream and downstream minimum areas, and fluidic injection is introduced at the upstream minimum area location.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations of a Bypass Dual Throat Nozzle

Guo

2014

Journal of Engineering for Gas Turbines and Power

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show abstract

“…In addition, fixed aperture nozzles would enhance lowdetectable integration aspects by eliminating moving flaps, discontinuities, and gaps [2]. For decades the fluidic thrust vectoring nozzles have evolved four main types, shock vectoring control (SVC) [3], counter flow [4], throat shift (TS) [5,6], and dual throat nozzle (DTN) [7]. Each method uses the secondary air source in a certain way.…”

Section: Introductionmentioning

confidence: 99%

“…Dual throat nozzle has been developed by NASA Langley Research Center based on the throat shifting method in 2003 [7]. The concaved cavity section is located between upstream and downstream minimum areas, and fluidic injection is introduced at the upstream minimum area location.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cavity on the Performance of Dual Throat Nozzle During the Thrust-Vectoring Starting Transient Process

Gu¹,

2013

Journal of Engineering for Gas Turbines and Power

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The dual throat nozzle (DTN) technique is capable to achieve higher thrust-vectoring efficiencies than other fluidic techniques, without compromising thrust efficiency significantly during vectoring operation. The excellent performance of the DTN is mainly due to the concaved cavity. In this paper, two DTNs of different scales have been investigated by unsteady numerical simulations to compare the parameter variations and study the effects of cavity during the vector starting process. The results remind us that during the vector starting process, dynamic loads may be generated, which is a potentially challenging problem for the aircraft trim and control.

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“…According to Flamm et al [11], the best thrust-vectoring performance is obtained when the two minimum areas are equal. Recently, other numerical and experimental investigations [12][13][14] have been performed, and new DTN optimal geometries have been suggested.…”

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confidence: 99%

Numerical Investigation of the Dynamic Characteristics of a Dual-Throat-Nozzle for Fluidic Thrust-Vectoring

Ferlauto

Marsilio

2017

AIAA Journal

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A computational method tailored for the simulation of fluidic thrust-vectoring systems is employed to investigate the dynamic response of a dual-throat nozzle in open-and closed-loop control. Thrust vectoring in fixed, symmetric nozzles is obtained by secondary flow injections that cause local flow separations, asymmetric pressure distributions, and, as a consequence, the vectoring of primary jet flow. The computational technique is based on a well-assessed mathematical model for the compressible unsteady Reynolds-averaged Navier-Stokes equations. A minimal control system governs the unsteady blowing. Nozzle performances and thrust-vector angles have been computed for a wide range of nozzle pressure ratios and secondary flow injection rates. The numerical results are compared with the experimental data available in the open literature. Several computations of the open-loop dynamics of the nozzle under different forcing have been performed to investigate the system response in terms of thrust-vectoring effectiveness and controllability. These computations have been used to extract autoregressive exogenous models of the nozzle dynamics. The effects of including the actuator dynamics are also discussed. Simple strategies of closed-loop control of the nozzle system by proportional-integrative-derivative regulators are investigated numerically. The closed-loop model predictive control of the system, based on the autoregressive exogenous models, is addressed.

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A computational study of thrust vectoring control using dual throat nozzle

Cited by 30 publications

References 3 publications

Experimental and Numerical Investigations of a Bypass Dual Throat Nozzle

Experimental and Numerical Investigations of a Bypass Dual Throat Nozzle

Effects of Cavity on the Performance of Dual Throat Nozzle During the Thrust-Vectoring Starting Transient Process

Numerical Investigation of the Dynamic Characteristics of a Dual-Throat-Nozzle for Fluidic Thrust-Vectoring

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