Aerodynamic performance analysis of a supercritical airfoil in the helicopter main rotor

Hasan, Inamul; Mukesh, R.; P, Radha Krishnan; Srinath, R.

doi:10.1139/tcsme-2021-0067

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…Parameters required for computational fluid dynamics simulations are itemized in Table 2. [29,30]. Simulations are used to study the downstream movement of fluids on different wing models.…”

Section: Results and Analysismentioning

confidence: 99%

Streamline Effect Improvement of Additive Manufactured Airfoil Utilizing Dynamic Stream Control Procedure

Srinath

Mukesh²,

Poojari

et al. 2022

Advances in Materials Science and Engineering

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In the era of fast transport, to create inventive stream ow management solutions that are capable of diminishing the aerodynamic drag of the vehicles, there is a need to modify the ow characteristics over the vehicle by deferring or expelling the position of the ow partition. e objective of this study involves the parameterized design of an airfoil utilizing the Bezier curve technique with the assistance of the simulation program. For ow regulations, synthetic jet modules are ingrained at di erent percentages of the chord to manage the stall characteristics. e parametrization system, combined with the stream control method, can give a much better insight into ow re-energization and pave some way for the reduction of the wake. Digital fabrication technique (3d printing or Rapid Prototyping method) is used to fabricate the end product for aerodynamic testing. e comparative outcome showed a reduction in drag at certain angles of attack due to the surface nish obtained. By comparing the results, the aerodynamic e ciency showed a signi cant rise of 13.05% at lower angles of attack when compressed gas was used in the synthetic jet closer to the frontier edge of the airfoil. Near the stall angle of attack, the coe cient of lift (Cl) and coe cient of drag (Cd) values showed no progress.

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Section: Results and Analysismentioning

confidence: 99%

Streamline Effect Improvement of Additive Manufactured Airfoil Utilizing Dynamic Stream Control Procedure

Srinath

Mukesh²,

Poojari

et al. 2022

Advances in Materials Science and Engineering

Self Cite

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show abstract

“…Advancements in additive manufacturing technologies help many fields in engineering, medicine, and research to test or demonstrate the models [14,15]. Material qualities are improved by the advancements in the development of composite materials and help make low-cost models faster [16].…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Testing and Validation of Helicopter Rotor Blades Using Additive Manufacturing

Hasan

Mukesh²,

Krishnan

et al. 2022

Advances in Materials Science and Engineering

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This research paper aims to validate the aerodynamic performance of rotor blades using additive manufacturing techniques. Wind tunnel testing is a technique used to find the flow characteristics of the body. Computational fluid dynamics (CFD) techniques are used for aerodynamic analysis, and validation should be done using wind tunnel testing. In the aerodynamic testing of models, additive manufacturing techniques help in validating the results by making models easily for wind tunnels. Recent developments in additive manufacturing help in the aerodynamic testing of models in wind tunnels. The CFD analysis of helicopter rotor blades was analyzed in this research, and validation was done using additive manufacturing techniques. Computational analysis was carried out for static analysis for the forward speeds of Mach numbers 0.3, 0.4, and 0.5. The results obtained were satisfactory to the previous results and were validated with wind tunnel testing. Results proved that the error percentage was lower, and the computational analysis was valid. In this research, models were designed using the FDM technique for wind tunnel testing as it is cost-effective and easy to manufacture.

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“…Wang (Wang et al , 2023) and Li (Li et al , 2021) conducted a study of the dynamic stall of the S809 airfoil in a sandy environment. Hasan (Hasan et al , 2022b; Hasan and P, 2022a) studied the influence of supercritical airfoil on helicopter characteristics and found that supercritical airfoil can increase efficiency and produce good aerodynamic characteristics. Liu (Liu et al , 2023) analysed the effect of sandy flow with a low Reynolds number in transonic flow on the aerodynamic performance of an airfoil of a Mars UAV.…”

Section: Introductionmentioning

confidence: 99%

Helicopter airfoil aerodynamic characteristics and rotor trim in sandy environments

Huang,

Cao,

Wang

2024

AEAT

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Purpose The sandy environment is one of the typical environments in which helicopters operate. Air-sand two-phase flow in sandy environments may be an important factor affecting flight safety. Taking a typical example, this paper aims to investigate the aerodynamic and rotor trim characteristics of the UH-60 helicopter in sandy environments. Design/methodology/approach A computational study is conducted to simulate the air-sand flow over airfoils based on the Euler–Lagrange framework. The simulation uses the S-A turbulence model and the two-way momentum coupling methodology. Additionally, the trim characteristics of the UH-60 rotor are calculated based on the isolated rotor trim algorithm. Findings The simulation results show that air-sand flow significantly affects the aerodynamic characteristics of the SC1095 airfoil and the SC1094R8 airfoil. The presence of sand particles leads to a decrease in lift and an increase in drag. The calculation results of the UH-60 helicopter rotor indicate that the thrust decreases and the torque increases in the sandy environment. To maintain a steady forward flight in sandy environments, it is necessary to increase the collective pitch and the longitudinal cyclic pitch. Originality/value In this paper, the aerodynamic characteristics of airfoils and the trim characteristics in the air-sand flow of the UH-60 helicopter are discussed, which might be a new view to analyse the impact of sandy environments on helicopter safety and manoeuvring.

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Aerodynamic performance analysis of a supercritical airfoil in the helicopter main rotor

Cited by 5 publications

References 28 publications

Streamline Effect Improvement of Additive Manufactured Airfoil Utilizing Dynamic Stream Control Procedure

Streamline Effect Improvement of Additive Manufactured Airfoil Utilizing Dynamic Stream Control Procedure

Wind Tunnel Testing and Validation of Helicopter Rotor Blades Using Additive Manufacturing

Helicopter airfoil aerodynamic characteristics and rotor trim in sandy environments

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