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Question: Consider the rocket nozzle described in Prob. Calculate the heat flux along the nozzle surface necessary to maintain the surface at 1100°C. If the convergent part of the nozzle is exposed to black-body radiation at 2200°C (the reactor core) and the nozzle surface itself is a black body, will thermal radiation contribute significantly to the heat flux through the nozzle walls?
Problem: A nuclear rocket nozzle of circular cross section has the geometry shown in Fig. The working fluid is helium, and the stagnation pressure and temperature are 2100 kPa and 2475 K, respectively. Assuming one dimensional isentropic flow, constant specific heats, and a specific heat ratio of 1.67, calculate the mass flow rate and the gas pressure, temperature, and density as functions of distance along the axis. Then, assuming that a laminar boundary layer originates at the corner where the convergence starts, calculate the momentum thickness of the boundary layer and the momentum thickness Reynolds number as functions of
distance along the surface. Assume that a transition to a turbulent boundary layer takes place if and when the momentum thickness Reynolds number exceeds 162. An approximate analysis may be carried out on the assumption of constant fluid properties, in which case let the properties be those obtaining at the throat. Alternatively, a better approximation can be based on the results of Prob. 11·5. In either case it may be assumed that the viscosity varies approximately linearly from µ = 5.9 x 10-5 Ns/m2 at 1400 K to fl = 8.3 X 10-5 Ns/m" at 2500 K.
Write down the program in VB.Net with a graphical user interface. Make the program Web based.
Write down a program which generates ten random permutations of numbers 1 to 10. To produce a random permutation, you require filling the vector with numbers 1 to 10 so that no two entries of vector have the same contents.
questiona nonempty slice of integers l p q is unimodal if there is some number m isin n such that p le m lt q l p m1 is
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What constitutes a well-maintained system, in terms of function utility, and reliability and how does the truly effective SysAdmin ensure success?
Data mining is the process of sorting through large amounts of data and picking out relevant information. Everyone from financial analysts to scientists use it to extract information from enormous data sets. These large data sets and the trend of ..
questioninternet protocol standards are devised throughout the efforts of thousands of people all over the world --
Analyse requirements for the construction of a database system based on an understanding of performance issues and Gather and analyse data for database performance and tuning.
Your organization has just completed the Initiation Process for implementing an Email System Upgrade. It was identified in a recent meeting with management leaders from the Sales, Consulting and IT departments that the current email system is caus..
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