JNTU
JNTU B.Tech IV INDUSTRIAL AERODYNAMICS Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Mention the types of winds.
Answer
Winds are generally classified into planetary (prevailing) winds, seasonal winds (monsoons), and local winds (land/sea breezes, mountain/valley winds).
What is purpose of studying of atmosphere in industrial aerodynamics?
Answer
Studying the atmosphere is essential to understand wind characteristics such as velocity profiles, turbulence intensity, and gust factors. This data is critical for predicting wind loads on structures, ensuring safety, and optimizing the design of buildings and wind energy systems against environmental conditions.
What are the applications of wind energy collectors?
Answer
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Write an expression for power coefficient and Betz coefficient.
Answer
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What is the purpose of the air cushion under a hovercraft?
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What is the aerodynamic drag effect on car performance?
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Do roof openings affect wind pressure distribution?
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Define wind load on a building. What is the relationship between wind force and building height?
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Define flutter.
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Why are cylinders and spheres considered bluff bodies?
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Part B
Explain in detail about the cause for surface wind gradients.
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How can thermal effects cause variation in winds? Explain.
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Bring out the difference between Horizontal Axis wind turbine HAWT and vertical axis Wind turbine VAWT.
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Explain the working of Savonius and Darrieus type wind turbine machines.
Answer
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Explain the mechanism of reducing the average drag coefficient over cars?
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How does wind tunnels help in understanding the aerodynamics of vehicles? Explain.
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Justify the statement “Air flow in buildings is complex, time dependent and multi-directional”.
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Explain about the types of wind load forces and their effect on Buildings.
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Explain the concept of vortex shedding and transverse oscillating loads. How do you address them?
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How are the vortex induced vibrations a source to galloping or stall flutter? Explain.
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