3D computational study of thrust vectoring using bypass mass injection in a propulsion nozzle

Nafi, Muhammad Abdun; Hasan, A. B. M. Toufique

doi:10.1063/1.5115900

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…However, the vectoring angle reported for multiple injection port configurations was still lower than a single injection slot [9]. To minimize the influence of a secondary flow injection in SVC, a bypass passage flow was conceived to control the deflection angle [10][11][12]. SVC can provide a high thrust vectoring angle and can be optimized for better performance but often at the expense of high thrust losses [13,14].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Thrust Vectoring Performance of Bypass Dual Throat Nozzle

et al. 2023

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Modern aircraft and missiles are gradually integrating thrust vector control systems to enhance their military capabilities. Bypass Dual-Throat Nozzle (BDTN) control is a new fluidic thrust vectoring technique capable of achieving superior performance with large vector angles and low thrust loss. In this study, we analyzed the flow characteristics and performance parameters of BDTN by varying the bypass angle, nozzle convergence angle, and bypass width. The flow governing equations are solved according to a finite volume discretization technique of the compressible RANS equations coupled with the Renormalization Group (RNG) k-ϵ turbulence model for Nozzle Pressure Ratio (NPR = 2~10) to capture the significance of under-expanded and over-expanded jets. Results show that by decreasing the bypass angle from 90° to 35°, there is a 6% increase in vectoring angle while the vectoring efficiency is enhanced by 18%. However, a decrease of 3% in the thrust and discharge coefficients is also observed. When the convergence angle was increased from 22° to 37°, vectoring angle, discharge coefficient, and thrust coefficient increased by 2%, 1%, and 0.26%, respectively. Moreover, vectoring efficiency is also enhanced by 8% by reducing the convergence angle from 37° to 22°. Based on the investigated parameters, it is determined that nozzle convergence angle does not significantly influence thrust vectoring performance, however, bypass width and bypass angle have a significant effect on thrust vectoring performance.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Thrust Vectoring Performance of Bypass Dual Throat Nozzle

et al. 2023

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Numerical investigation of dynamic characteristics of dual throat nozzle and bypass dual throat nozzle in thrust vectoring starting process

ZHANG,

XU,

CAO

et al. 2024

Chinese Journal of Aeronautics

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Techniques of Fluidic Thrust Vectoring in Jet Engine Nozzles: A Review

Afridi,

Khan,

Shah

et al. 2023

Energies

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Thrust vectoring innovations are demonstrated ideas that improve the projection of aerospace power with enhanced maneuverability, control effectiveness, survivability, performance, and stealth. Thrust vector control systems following a variety of concepts have been considered for modern aircraft and missiles to enhance their military performance. Short Take-off and Landing (STOL) and control effectiveness at lower aircraft speeds can be achieved by employing Fluidic Thrust Vectoring Control (FTVC). This paper summarizes a range of ideas for FTVC that have been designed and tested both computationally and experimentally to determine the thrust vectoring performance of supersonic propulsion system nozzles. The conventional method of thrust vectoring involves mechanical means to deflect the direction of flow of the exhaust gases, whereas the most recent method involves fluidic-based thrust vectoring techniques. Fluid-based thrust vectoring has the advantages of simplicity and low weight over mechanical-based thrust vectoring, which has complex geometry and adds extra weight to the aircraft. The fluidic vectoring control nozzles are divided into seven categories: shock vector, bypass shock vector, counterflow, co-flow, throat skewing, dual throat, and bypass dual throat nozzle control. This paper provides a summary of each fluidic thrust vectoring technique with its characteristics, design, classification, and different operational criteria developed to date and compares the intrinsic characteristics of each technique. Based on the present literature, it is concluded that among all the fluidic control techniques, the bypass dual-throat nozzle control can achieve better thrust vectoring performance with large vector angles and low thrust loss.

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3D computational study of thrust vectoring using bypass mass injection in a propulsion nozzle

Cited by 3 publications

References 6 publications

Numerical Investigation on the Thrust Vectoring Performance of Bypass Dual Throat Nozzle

Numerical Investigation on the Thrust Vectoring Performance of Bypass Dual Throat Nozzle

Numerical investigation of dynamic characteristics of dual throat nozzle and bypass dual throat nozzle in thrust vectoring starting process

Techniques of Fluidic Thrust Vectoring in Jet Engine Nozzles: A Review

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