Basics of Aerothermodynamics: Second, Revised Edition by Ernst Heinrich Hirschel

By Ernst Heinrich Hirschel

This profitable publication supplies an creation to the fundamentals of aerothermodynamics, as utilized particularly to winged re-entry automobiles and airbreathing hypersonic cruise and acceleration automobiles. The ebook offers a evaluate of the problems of shipping of momentum, strength and mass, real-gas results in addition to inviscid and viscous movement phenomena. during this moment, revised variation the chapters with the classical subject matters of aerothermodynamics roughly have been left untouched. The entry to a couple unmarried subject matters of functional curiosity was once more advantageous. Auxiliary chapters have been positioned into an appendix. the new profitable flights of the X-43A and the X-51A point out that the sunrise of sustained airbreathing hypersonic flight now has arrived. This proves that the unique method of the booklet to place emphasis on viscous results and the aerothermodynamics of radiation-cooled automobile surfaces was once well timed. This moment, revised variation much more accentuates those subject matters. a brand new, extra bankruptcy treats examples of viscous thermal floor results. partially simply very lately got experimental and numerical effects convey the complexity of such phenomena (dependence of boundary-layer balance, dermis friction, boundary-layer thicknesses, and separation at the thermal nation of the outside) and their value for airbreathing hypersonic flight automobiles, but additionally for the other form of hypersonic vehicle.

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Extra resources for Basics of Aerothermodynamics: Second, Revised Edition

Example text

Hypersonic flight-vehicle concepts in the velocity-altitude map (v ≡ v∞ ) with flight Mach numbers M∞ [5] (based on [9]). Fig. 3. Hypersonic flight-vehicle concepts in the velocity-altitude map with flight unit Reynolds numbers (Re/L ≡ Reu∞ ), and equilibrium real-gas total temperatures To (≡ Tt ) [5] (based on [9]). 28 2 The Flight Environment Fig. 8 km/s air can be considered as a calorically and thermally perfect gas. 6 km/s vibration excitation must be taken into account. Above v∞ ≈ 2 km/s first occurs dissociation of oxygen and then of nitrogen.

The book has three introductory chapters. On Chapter 1, the introduction, follows Chapter 2, treating the flight environment, which in the frame of this book predominantly is the Earth atmosphere below approximately 100 km altitude. Chapter 3 is devoted to the discussion of the thermal radiation cooling of outer vehicle surfaces. This cooling is a basic condition for hypersonic flight of all kinds. Chapters 4 to 9 are devoted to the classical topics of aerothermodynamics. Chapter 4 gives the basic mathematical formulations regarding transport of mass, momentum and energy.

In such cases a prescribed wall temperature is to be supported by a finite heat flux into the wall and towards the heat exchanger. , [6]. In the following we summarize the above discussion. We neglect possible shock-layer radiation and tangential heat fluxes [2], a possible temperature jump,2 and assume, as above, that the radiative transport of heat is directed away from the surface. We then arrive at the situation shown in Fig. 1. Five cases can be distinguished: 1. Radiation-adiabatic wall: qw = 0, qrad = −qgw .

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