Thermodynamic properties of nitrogen at high pressures

Antanovich, A. A.; Plotnikov, Michael; Savel'ev, G. Ya.

doi:10.1007/bf00916174

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Figure 1 shows such a diagram for nitrogen, which was calculated using the semi-empirical equation of state proposed by Zykov and Sevost'yanov [5], which yields results that practically coincide with the data of [1]. For pressures higher than 1000 atm, a sharp rise of isotherms is observed with increasing pressure in a dense gas.…”

Section: Introduction the Physical Basis For Using High Pressures Insupporting

confidence: 50%

“…Using the A-1 facility, probes for pressure measurement under conditions of the plenum chamber of hypersonic wind tunnels for a pressure range from 3000 to 10,000 atm and higher have been developed [20]. The method of direct measurement of the hypersonic flow velocity by means of electric discharge tracking [21] has been improved and adapted, which allowed experimental verification of the validity of the equations of state of the gas, proposed in [1,5], and methods of calculation of heat losses in the channel of a high-pressure aerodynamic facility [22]. The search for materials for nozzle throats and testing of their strength has been performed and has continued [23].…”

Section: Rnl -~mentioning

confidence: 99%

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Use of high pressures for solving problems of hypersonic aerodynamics

Рычков

Topchiyan

Meshcheryakov

et al. 2000

J Appl Mech Tech Phys

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On the occasion of the 100th anniversary of M. A. Lavrent'ev, it seems pertinent to summarize the longterm work on the physical foundations, design, and manufacturing of sources of high-pressure gases for hypersonic wind tunnels in the pages of a journal founded with the immediate participation from M. A. Lavrent'ev. This direction of experimental aerodynamics received invaluable support of M. A. Lavrent'ev in early 1970s, without which the scientific ideas would not, probably, be put into practice.The idea of using high (up to 20,000 atm) pressures of a gas in the plenum chamber in an aerodynamic experiment was first put forward in the late 1960s by M. A. Plotnikov [1] who worked at that time in Research Institute-1 in the group of Prof. E. I. Shchetinkov, one of the founders and proponents for using supersonic combustion in air-breathing engines of hypersonic flying vehicles (HFV) for Mach numbers from 8 to 20 [2]. At the same time, the papers of Soviet and American scientists posed the question of the necessity of developing of a reentry HFV with an aircraft-type take-off and landing, capable of taking payloads to the orbit of an Earth's satellite and back. It is expected that, with the use of these vehicles, the cost of putting payloads to orbit, which is the key economic factor of using spacecraft systems in practical activity outside of the military field, will decrease by 5 to 8 times. One of the main obstacles for the use of such systems is the absence of knowledge on the complex of fundamental phenomena that accompany and ensure the HFV flight. The existing hypersonic aerodynamic facilities do not allow one to create conditions necessary for testing the corresponding HFV models [4]. This is especially true for reproduction of Reynolds numbers and ensuring test-gas purity and run time.At the end of the 1960s, M. A. Plotnikov and his colleagues developed tables of thermodynamic functions of nitrogen [1] from which it followed that the transition to the pressure region up to 10,000-20,000 atm leads to an additional contribution to the gas enthalpy equivalent to a temperature increase by approximately 1000 K per each 10,000 atm. On the one hand, this offered a possibility of increasing the Lavrent'ev Institute

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Section: Introduction the Physical Basis For Using High Pressures Insupporting

confidence: 50%

Section: Rnl -~mentioning

confidence: 99%

Use of high pressures for solving problems of hypersonic aerodynamics

Рычков

Topchiyan

Meshcheryakov

et al. 2000

J Appl Mech Tech Phys

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“…This facility was used to develop pressure cells for the conditions of stilling chamber of hypersonic facilities in the range from three to ten thousand atmospheres and higher [106]. The method of direct measurement of velocity of hypersonic flow using electric-discharge tracing was improved and adapted [15]; this method enabled one to experimentally check the validity of equations of state for gas suggested in [11,17,24,33,107] and of the methods of calculation of heat loss in the circuit of a high-pressure aerodynamic facility [18]. Activities are continued which involve the search for materials for the critical cross section of nozzles and the testing of their stability [108].…”

Section: Nonisentropic Heating Of Gas Under Conditions Of Flow From Cmentioning

confidence: 99%

“…This method is used to study the aerothermogasdynamics of flying vehicles under conditions that are as close as possible to those of full-scale testing and to investigate the physicochemical properties of gases [22][23][24][25] and kinetics of chemical reactions [1,[26][27][28] in gas mixtures at high densities and temperatures [23,26], as well as to simulate a turbulent boundary layer [29,30]; the method is further employed in technologies for the synthesis of substances and surface treatment [31,32].…”

Section: Introductionmentioning

confidence: 99%

Heat-engineering units for the generation of dense high-temperature gas

Volov

2006

High Temp

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Various methods of gas compression are reviewed, which are intended for heating the gas. Special attention is given to units of nonisentropic compression of the mechanical heat-engineering type, in which the gas is transferred from chamber to chamber in order to increase the temperature. The units are subdivided into classes or systems, namely, those of impulse, pulse-periodic, and continuous operation. Methods are discussed of mathematical description of processes occurring in units of this type, including analytical investigation of simplified qualitative models and numerical simulation in more complex cases close to reality. CONTENTS

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