Which of the following is the best Stephanie Redfern Saylor Foundat

Question 32 / 40: Which of the following is the best explanation for why rocket engine nozzles are made of convergent-divergent sections? I. Flow does become supersonic in a purely convergent flow. II. The divergent section is important for controlling thrust direction. III. The combination reduces resonant disturbances to the mechanical structure of the nozzle. IV.. The symmetry of the device aids in analysis and manufacture.

A I and II only

B I and III only

C I only

D I, II, III, and IV

E III and IV only

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Explanation:

See the resource from subunit 7.2. The main concept relates to stagnation of the flow in a convergent section. The flow may become supersonic in the divergent section and this section can direct the thrust.

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Fluid Mechanics ME201

Author:

Stephanie Redfern

The Saylor Foundation

USA

Access: Public Instant Grading

Attribution: Stephanie Redfern and Tuan Dinh. Fluid Mechanics. The Saylor Academy 2014, http://www.saylor.org/courses/me201/

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