Method of Improving the Quality of Theoretical and Experimental Research at the Stage of Development Complex Technical System

Abstract

On the example of development a unique on-board gasification system for non-produced residues of liquid fuel in the tanks of the launch vehicle stage, the improvement of the quality of theoretical and experimental research is considered. Due to the uniqueness of the developed on-board gasification system, which begins functioning after the main liquid rocket engine (LRE) is turned off, there are no studies of the proposed method of gasification (evaporation) based on the supply of a carrier heat in the form of hot gas to the tank with liquid fuel residues, and the methodology for selecting the design -engineering parameters of the on-board gasification system. It is obvious that the creation of a methodology for selecting the design -engineering parameters of the on-board gasification system, the further development of the on-board gasification system and the study of its functioning to improve the quality is impossible without conducting a study of the convective gasification process in the fuel tank. To develop a physical and mathematical model and a physical model of the gasification process, an experimental model installation with a model liquid as part of an experimental stand is considered.

Improving the quality of modeling thermodynamic processes

“…Evaluation of the effectiveness of the proposed approach to improve the quality at the stage of scientific research showed that the reliability of the obtained information (calculated and experimental) increased by 10 -15% [5], the cost of resources for research decreased by 20-25%, the time for debugging the program of numerical simulation reduced by 15-20%, increased productivity was 22%.…”

“…where: w is the HC input rate, λ is the thermal conductivity, α is the heat transfer coefficient, ν is the kinematic viscosity, a is the thermal conductivity coefficient, 𝒍 is the characteristic size. Figure 2 below shows the scheme of the process of application of the proposed approach in order to improve the reliability of PM [5]. By introducing the proposed requirements and validation and verification criteria [8], which allow improving the quality of theoretical-experimental studies, the following results are achieved: -rejection of invalid measurements; -timely troubleshooting; -reduction of the resources spent on the experiment.…”

“…In addition to solving the problem of passivation of fuel residues, gasification is an opportunity to extract unused energy resources, contained in the unreleased fuel residues, which in the future can be used, for example, for boostering a booster stage with a payload after shutdown of a boostering liquid-propellant rocket, descent from orbit, angular stabilization, etc. [5,6]. The considered OGS is based on supplying a hot coolant into the tank, providing evaporation of the fuel component.…”

“…Figure 1. Scheme of the developed methodology to improve the quality of researchTo improve the quality of scientific research, it was necessary to carry out a number of additional measures aimed at modernizing the existing ES and the composition of the measuring equipment outlined in[5]. Figure2below shows the scheme of the process of application of the proposed approach in order to improve the reliability of PM[5].…”

“…Scheme of the developed methodology to improve the quality of researchTo improve the quality of scientific research, it was necessary to carry out a number of additional measures aimed at modernizing the existing ES and the composition of the measuring equipment outlined in[5]. Figure2below shows the scheme of the process of application of the proposed approach in order to improve the reliability of PM[5]. By introducing the proposed requirements and validation and verification criteria[8], which allow improving the quality of theoretical-experimental studies, the following results are achieved: -rejection of invalid measurements; -timely troubleshooting; -reduction of the resources spent on the experiment.…”