A new method for predicting daytime and nighttime temperatures of stratospheric balloons

Abstract

A novel method for forecasting the daytime temperature and the night temperature of a stratosphere balloon comprises the steps of 1 providing assumption conditions of the novel method for forecasting the daytime temperature and the night temperature of the stratosphere balloon; 2 according to the use environment of the stratosphere balloon and basic knowledge of the engineering thermodynamics, determining the energy exchanging mechanism of the stratosphere balloon and all energy exchanging items; 3 establishing heat analysis models of the energy exchanging items respectively to obtain specific parameterized expression forms of all the energy exchanging items; 4 according to the principle of energy balance, an energy balance equation of the stratosphere balloon in daytime and an energy balance equation of the stratosphere balloon at night are established respectively; 5 substituting all the energy exchanging items obtained in the step 3 into the energy balance equations in the step 4, and then a simple iteration method in a numerical solution method is used for obtaining the daytime temperature of the stratosphere balloon and the night temperature of the stratosphere balloon. According to the novel method forecasting the daytime temperature and the night temperature of the stratosphere balloon, only bag cloth material parameters, the suspension height and the suspension time are needed, and then the daytime temperature and the night temperature of the stratosphere balloon can be obtained.

Description

technical field [0001] The invention provides a new method for predicting daytime and nighttime temperatures of stratospheric balloons, which belongs to the field of aviation technology. Background technique [0002] Stratospheric balloons are low-cost, high-efficiency aircraft that can perform long-term reconnaissance missions and deliver goods, and have very broad application potential and prospects. Therefore, related technologies have become a research hotspot this year. The temperature of the stratospheric balloon when it is suspended is one of the key input parameters for the designers, especially the selection of the material of its capsule cloth. Therefore, how to obtain an effective temperature has always been a problem that engineers need to solve. The temperature can be directly measured through the stratospheric balloon flight test, but the cost of the test is relatively high, and the time-consuming and labor-intensive period is long, and it is difficult to measu...

AI Technical Summary

Problems solved by technology

The temperature can be directly measured through the stratospheric balloon flight test, but the cost of the test is relatively high, and the time-consuming and labor-intensive period is long, and it is difficult to measure all the conditions through the test; the finite element numerical simulation method needs to establish a complex finite element model , the calculation is complex and the calculation efficiency is low; in some existing analytical methods, the factors considered in the model are not comprehensive enough, and the theoretical solution is also relatively complicated

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