Effect of air jet with injection pressure on the performance of mixed compression air intake

Gahlot, N. K.; Singh, Narender

doi:10.1177/0954410020966507

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…With continuous attenuation, it disappears when it enters the core area. Then the jet flow enters the central section [31][32][33][34] .…”

Section: Study On Seed Stressmentioning

confidence: 99%

Design and experiment of pneumatic seed clearing mechanism for pin-hole tube wheat plot precision sowing device

Zhang,

Yang,

Wang

et al. 2023

International Journal of Agricultural and Biological Engineering

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For the problem that when wheat is sucked up by the air suction method, the seeds are aligned in a small area, making it difficult for the contact seed cleaning mechanism to clean the seeds. The mechanism of seed cleaning airflow on wheat seed was studied, the flow velocity distribution relationship of the jet section was defined, the mathematical model of the jet velocity of circular and plane sections was established, and the key factors that could have a significant influence on seed cleaning effect were explored. A non-contact positive pressure air flow seed cleaning method was proposed. After theoretical calculations, it is concluded that the core section lengths of the circular section jet and the inline jet are 24.8 mm and 28.8 mm, respectively. The clearing distance is set to 20 mm. Through the single-factor test, the best air tube nozzle shape was clarified as a vertical inline nozzle. The angle of seed cleaning, the air velocity of seed cleaning, and the negative supply pressure were selected as influencing factors, and the seed leakage index, seed reabsorption index, and seed qualification index as the evaluation indicators to conduct a 3-factor 5-horizontal rotation test. A mathematical regression model of influencing factors and evaluation indexes was established to analyze the influence of these factors and indexes. The optimal operation parameters were obtained as the seed cleaning Angle of 19°, the seed cleaning air velocity of 58 m/s, and the negative pressure of 8.5 kPa. Under the optimal parameters, the seed leakage suction index is 8.23%, the seed reabsorption index is 0.33%, and the seed qualification index is 91.44%, which meets the design requirements.

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“…With continuous attenuation, it disappears when it enters the core area. Then the jet flow enters the central section [31][32][33][34] .…”

Section: Study On Seed Stressmentioning

confidence: 99%

Design and experiment of pneumatic seed clearing mechanism for pin-hole tube wheat plot precision sowing device

Zhang,

Yang,

Wang

et al. 2023

International Journal of Agricultural and Biological Engineering

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“…Details of grid selection are given in the authors' recently published article. 36 To reduce the computation time, the use of symmetry has been made and only half of the geometry is investigated for the present study. Ramp pressure distribution for all the grids is compared with the experimental results of Das and Prasad 33 in Figure 5 for 4°cowl deflection.…”

Section: Grid Consistency and Boundary Conditionsmentioning

confidence: 99%

Control of shock‐induced separation inside air intake by vortex generators

Gahlot

Singh

2021

Heat Trans

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The present investigation is aimed towards the effect of passive methods on the performance of supersonic air intake along with the control of shock wave boundary layer interaction at various engine operating conditions. A computational study has been carried out in this regard using the commercially available software Ansys Fluent. The k-ω turbulence model has been selected for the present investigation. All the simulations have been carried out at a design Mach number of 2.2. The Independent effect of the air-jet vortex generator (AJVG), tapered micro ramp vortex generator (MRVG), and the combined effect of AJVG with MRVG on the shock wave boundary layer interaction have been investigated. Detailed comparative studies of all controlled cases with uncontrolled cases show significant improvement in the flow field inside the air intake and improved performance. The shock train is also captured for all the cases along with shock wave boundary layer interaction at various operating conditions. The movement of the normal shocks is seen as the backpressure increases. All the essential performance parameters related to air intake have been examined in detail. The hybrid type of control showed better performance.

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Assessment of the hypersonic intake isolator and performance evaluation at various flight conditions

Sandeep,

Gupta

2024

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Effect of air jet with injection pressure on the performance of mixed compression air intake

Cited by 7 publications

References 20 publications

Design and experiment of pneumatic seed clearing mechanism for pin-hole tube wheat plot precision sowing device

Design and experiment of pneumatic seed clearing mechanism for pin-hole tube wheat plot precision sowing device

Control of shock‐induced separation inside air intake by vortex generators

Assessment of the hypersonic intake isolator and performance evaluation at various flight conditions

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