2020
DOI: 10.18186/thermal.726106
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An Investigation of Effect of Control Jets Location and Blowing Pressure Ratio to Control Base Pressure in Suddenly Expanded Flows

Abstract: The drag force is an essential factor in any projectile, from road vehicles to rocket or aircraft. The total drag includes skin friction drag, wave drag, and base drag. The base drag is the drag due to low pressure in the base region of the projectile. In the case of suddenly expanded flows, due to the sudden expansion of flow from the nozzle into the enlarged duct, the low pressure is created in the base region of the enlarged tube, which results in base drag and hence overall thrust reduced. In this paper, C… Show more

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Cited by 21 publications
(10 citation statements)
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“…The K-epsilon turbulent model was used for the analysis [13][14][15][16]. The k-ɛ model predicts the turbulent flow near-wall region and laminar flow very accurately in central channels of the monolith; considering the transition of flow from laminar to turbulent inside the monolith, the model accurately predicts the pressure and velocity field, which otherwise were inaccurately predicted by RNG k-ɛ, k-ω as justified various authors [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”
Section: Boundary Conditionsmentioning
confidence: 95%
“…The K-epsilon turbulent model was used for the analysis [13][14][15][16]. The k-ɛ model predicts the turbulent flow near-wall region and laminar flow very accurately in central channels of the monolith; considering the transition of flow from laminar to turbulent inside the monolith, the model accurately predicts the pressure and velocity field, which otherwise were inaccurately predicted by RNG k-ɛ, k-ω as justified various authors [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”
Section: Boundary Conditionsmentioning
confidence: 95%
“…The CFD analysis is carried out for all possible parameter combinations. The k-epsilon turbulent model is employed for analysis which is more suitable and reliable turbulent model in variety of applications [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Inlet is a velocity inlet, and outflow is a pressure outlet for the boundary conditions.…”
Section: Cfd Analysismentioning
confidence: 99%
“…From the previous study by Aabid et al, [15], the microjets were used to control the base drag in the sudden expansion region. More studies in the literature are available on suddenly expanded flows to find the parameters affecting base pressure [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”
Section: Effect Of Npr On Pressurementioning
confidence: 99%