K.: Ideal gas relations for the description of real gas isentropic changes. Forsch. Ing.-Wesen 51 , 169–174 (1985).Kouremenos D.A, Kakatsios X.K.Ideal gas relations for the description of the real gas isentropic changes, in :Forschung im Ingenieurwesen 1985;51:169-174....
Pressure-volume diagrams for three types of compression. 14.6.1 Basic Relations The design of a compressor begins with the first law of thermodynamics, the conservation of energy. It is written for the steady state gas flow through the compressor as follows: (14.2)(h2+u222+gz2)−(h1+u...
Entropy is increased across a shock, therefore the isentropic relations given in the previous section cannot be applied directly when shocks are present. In order to circumvent this, a shock is assumed to be an infinitely thin discontinuity across which the flow parameters change, and the flow ...
psia. Verify results obtained with values from the appropriate graph in Appendix D with calculations involving ideal gas equations. Is condensation of water vapor a concern? (a) Using the isentropic relations of this chapter, what is the critical pressur...
Real gas isentropic changes may be described using the three well known ideal gas relations, pv k = const , p (1k) T k =const and Tv k -1 = const , where exponent k has for each equation a different value k p, ν , k p, T and k T, ν respectively. In this paper the ...
Knowledge of the viscosity of pure liquids and respective mixtures and study of the viscosity calculation methods are important for practical and theoretical purposes [29,30]. In the present work, three typical semi-empirical relations are used to correlate the experimental viscosity data of the inve...
The foregoing relations cannot be applied to a steam turbine as vapors generally do not obey the gas law. The reheat factor (RH) is used to measure the hidden inefficiency of the complete expansion (from state 1 to state 2) due to the irreversibility. (15.20)RH=∑Δhs,p/(h1−h2S) ...
there are a large number of gas dynamic problems with entropy increase negligibly slight, which for the purpose of analysis are assumed to be isentropic. Examples are flow through subsonic and supersonic nozzles, as in wind tunnels and rocket engines; and shock-free flow over a wing, fuselag...
The isentropic change of an ideal gas is described by the well known relations pv k =const, Tv (k−1) =const and p (1−k) T k =const, where the exponent k is defined as the ratio of the constant pressure to the constant volume specific heat, k=c p /c v . The same ...
It follows that exponent k , which appears in various relations in thermodynamics, fluid mechanics, gasdynamics, heat transfer etc., should be suitably replaced by combinations of the three exponents. Related numerical examples, made in the case of real air, showed that the use of k leads (...