Influence of the structure of a droplet sheet on the capacity of frameless space radiators and the efficiency of the power units

The influence of long-range interactions on the progress of heat waves in the radiationcooling disperse flow is considered. It is shown that the system exhibits oscillations attendant on the process of establishing an equilibrium temperature profile. The oscillation amplitude and the rate of oscillation damping are determined. The conditions under which the radiation cooling process can be unstable with respect to temperature field perturbations are revealed. The results of theoretical analysis and numerical calculation of the actual droplet flow are compared.

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“…The function f |i−j| (x) was calculated using the method set forth in [6]. Figure 8 shows the function…”

Section: Russian Journal Of Nonlinear Dynamicsmentioning

confidence: 99%

“…Calculations reveal that the use of the structured droplet flow (Fig. 2) enables an increase in the LDR power by a few tens of per cent as compared to the case of uniform arrangement of particles [6]. Long-range radiation interactions make a noticeable contribution to overradiation of particles.…”

Section: Introductionmentioning

confidence: 98%

The Effect of Long-Range Interactions on Development of Thermal Waves in the Radiation-Cooling Dispersed Flow

Safronov¹,

Коротеев²,

Filatov³

et al. 2018

Nelin. Dinam.

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“…Modeling the capillary breakup of viscous fluid jets is an important task for many technical applications [1][2][3][4][5][6][7][8][12][13][14][15][16]. One of them is a liquid droplet radiator designed to remove low-grade heat from new-generation space power systems.…”

Section: Introductionmentioning

confidence: 99%

“…One of them is a liquid droplet radiator designed to remove low-grade heat from new-generation space power systems. The idea of droplet radiator consists in the radiation cooling of specially formed dispersed flow, which freely propagates in space [1]. The requirement of low evaporability is placed on the heat carrier of such radiators.…”

Section: Introductionmentioning

confidence: 99%

Capillary Hydraulic Jump in a Viscous Jet

Safronov¹,

Коротеев²,

Filatov³

et al. 2019

Nelin. Dinam.

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Stationary waves in a cylindrical jet of a viscous fluid are considered. It is shown that when the capillary pressure gradient of the term with the third derivative of the jet radius in the axial coordinate is taken into account in the expression, the previously described self-similar solutions of hydrodynamic equations arise. Solutions of the equation of stationary waves propagation are studied analytically. The form of stationary soliton-like solutions is calculated numerically. The results obtained are used to analyze the process of thinning and rupture of jets of viscous liquids.

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