Vol 6, No 2 (2007): Special Issue

It is shown formation peculiarities of gas temperature fields for combustion chambers of small gas turbine engines. It is described the more sharp calculation model of hydraulic resistance ratio, also in details it is shown the influence of combustion chambers’ design parameters on gas flow’s temperature fields and it is proposed recommendations for design and production of combustion chambers for small gas turbine engines.

This paper deals with the method of numerical modeling of physical processes in fuel tank, which can be refueled by cryogen conventional gas or compressed conventional gas. Calculation data confirm real prospects of creating of universal tanks pilot models and their tests and exploitation.

Use of the offered method of diagnostics of parameters air-fuel spray allows finding spatial and time heterogeneity of concentration of drops and their sizes in real front devices. Carried out research atomization fuel from a plate has shown an opportunity of application of this device in engines for improvement of a spray in comparison with atomization of free jet in a cross flow stream.

It is described questions of CARS spectroscopy nonlinear optical method using in investigations of gas flows, burns and electrical charges. It is shown that the using of this local diagnostic method allows receiving not only quality information, but also quantitative data about frequencies and lines’ width in diffusion specters of molecular transitions, functions of molecule condition’s distribution, temperatures in range 10-4000K and about processes of molecule energy distribution and transmission.

Formula for evaluation of the gas flow turbulence intensity value at the gas turbine combustion chamber outlet was substantiated and relation of this value to its design parameters was shown.

This paper deals with the method of numerical modeling of physical processes in fuel tank, which can be refueled by cryogen conventional gas or compressed conventional gas. Calculation data confirm real prospects of creating of universal tanks pilot models and their tests and exploitation.

The article deals the data illustrated the charge swirl motion impact to heat engines parameters. This paper describes the opportunity of swirl motion regulation in the engine with separated induction system. The experimental data confirm effective and emission parameters improving without power and volumetric efficiency decreasing inWOT operation.

This paper deals with thermodynamic effect of gas stream division during high-speed outflow and its using in different fields of human activity.

In this paper it is proposed alongside with known calculation formulas a new formula, which shows very well an influence of different factors upon filling process in piston engine.

The combustion model, based on the idea of combustible mixture ignition by turbulent pulsations of the burned gas moles, is proposed. The model includes increasing of lean region of ignition with temperature increase and gas swirling effect on burning rate. Comparison of the two schemes of burnings of lean mixtures in proposition of equal mass flows and velocities of fuel mixtures shows that at swirling only central flow mean burning efficiency at initial part of tube is more for inverted (outward) scheme of ignition. Full burning of mixture for tradition scheme is realized more effectively.

During process of accurate grinding of gas turbine engine’s elements it is paid attention to combustion chamber, because it requires a lot of experiments in laboratories and in real conditions. Software applications, realizing math models, either in design calculations or in verification calculations makes a design and accurate grinding process easy, but also decrease their costs.

There exist a number of methods for heating of materials and machine elements. But radiation method is the most effective and economical one out of them i.e. transfer of heat energy from it is source (generator) to the object by means of radiation. With regards to this infrared radiation has got the greatest interest. The heat generated by the radiating surface is similar to the sun. The gas is burning in the combustor where, heated to the specific temperature, forms a heat flux (wave radiation of infrared spectrum), directed to the heat source or to the object directly. Infrared ray falling to the surface (floor, objects, equipment) heats the surface. The air in the hot zone is heated for the second time by the heated surfaces. Heat waves immediately form comfortable microclimate in the zone.

The advantages of a detonation application in aviation power-plant were proved with the thermodynamics point of view. The review of detonation utilization in aviation engine were performed, also the advanced conceptions were selected. Quick information about state of pulse detonation engine research was reported. The issues of pulse detonation engine development were structured and schematically show.

This article deals with boundary layer separation problems in diffusion channels with swirling cells and it is also shown investigation results.

The paper presents the results of CFD flow simulation inside the micro scale burner. The study has been carried out in order to evaluate the influence of grid density, burner scale, turbulent models and viscous variation driven by temperature variation on the mixture uniform at the burner back end.