The constructal principle and character law, hyperbolic, of natural design, a new paradigm of aerospace systems
In recent years, it is often talking more about design, a new concept, transdisciplinary, that goes beyond, as is known, the term engineering, commonly used today in technique. In our view, the design, which includes engineering (measure), aesthetics (beautiful) and architecture (construction), involves a qualitative evaluation of a system that adds and complements the quantitative assessment of him. This aspect, of quality, is ever present now, in addition to many other features, through the idea of beauty or what is called aesthetics. So, engineering, an important component of technical sciences, involves a reductionist treatment, cartesian of the system, which, essentially, involves dividing the whole into parts, analyse them in detail and techniques of computer calculation, and then integrate them, which lead them, to an underestimate of the system, entirely. The aircraft is not an integration, summation of the main components, structure, propulsion system and all avionics equipment, but it is a holistic concept, overall and integral, representing interactions, interconnections and, in other words, the relationship between them. If engineering is, primarily, a technique treatment through analysis and synthesis, design is based on the idea of integrity, namely to establisha constructal principle and a character law that, unites and binds, the two principles of existence, in general, respectively, principles of harmony and complementarity, or which is harmonic complementarity. The paper, set the physical and mathematical foundations of the global, holistic and natural model of performance of an aerospace propulsion system from turbojet engine family, having as foundation the law of hyperbolic harmony of the universe, taking as a basis, the duality between the thrust, via the gas dynamics function of momentum and mass, by gas dynamics flow function. We get, thus, another point of view on thrust but, also a complete solution of David Hilbert's fourth problem. It is also found - introduction of the hyperbolic harmony principles by combining universal principles well known of complementarity and harmony; - introduction and use of specific concepts for turbojet engine; - using, instead of absolute amounts of intake, mass, thermal and geometric coefficients, in evaluating specific thrust force; - development of new solutions, modern of non-pollutant turbojet engines; - transformation from simple engine design to complex engine concept design, ie, engineering, aesthetics and architecture as well as transformation, through complementary, linear jet engine in a ortho-turboreactor engine.