GATE AE 2023 Paper 1 — page 19

Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.

The operating characteristics of a pump were measured to be

, where power coefficient

is the flow coefficient,

is a constant, D is a length scale,

is the rotation rate,

is fluid density, and P is the power required. The flow coefficient is a dimensionless volume flow rate scaled with

and D. Assuming that the flow rate remains the same, if the rotation rate is increased to

, the power changes to

. The value of

is _______. (round off to two decimal places)

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A thin cambered airfoil has lift coefficient

at an angle of attack

. Assuming that stall occurs at much larger

, the

is _______. (round off to two decimal places)

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In a potential flow, a uniform stream of strength U directed along the x-axis and four line sources (2-dimensional) of strengths

are placed along the x-axis at x = 0, 1, 2 and 3, respectively. The strength of an additional line source to be placed at x = 4 such that a closed streamline encircles all five sources is _____. (round off to two decimal places).

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2023 · Paper 1

Question 55

Question 56

Question 57