空气动力学学报2025，Vol.43Issue(7)：108-117,10.DOI:10.7638/kqdlxxb-2025.0114
高焓电弧风洞等离子体参数测量
Measurement of plasma parameters in high-enthalpy arc-heated wind tunnel
摘要
Abstract
Ground-based testing represents a critical method for plasma flow field characterization.To address the requirements for plasma parameter identification in high-enthalpy flows,this study performed experimental measurements of typical plasma parameters in an arc-heated wind tunnel.A blunt wedge flat-plate model with angle of attack was used to simulate spacecraft flow fields over large surface areas.The spatial distribution of electron density in the wedge model flow field was measured using electrostatic probe diagnostics combined with motorized scanning technology,while corresponding numerical simulations were conducted for comparison and validation.The investigation revealed that under current wind tunnel conditions,plasma parameters remained essentially uniform and stable within the 80 mm thick core region along the z-direction of the rectangular nozzle.However,electron density showed significant attenuation near the nozzle sidewalls due to boundary layer effects.The employed probe measurement scheme demonstrated minimal influence on electron density detection.For relatively high electron density conditions(～1011 cm-3),measured values agreed well with simulations,showing deviations less than 0.5 orders of magnitude.In contrast,under low electron density conditions(～1010 cm-3),measured values significantly exceeded computational results by 0.5-1 orders of magnitude.Preliminary analysis indicated that copper contamination from electrode ablation served as a major contributing factor for this discrepancy.This study provides an effective validation method for near-wall plasma parameter measurements in aircraft applications.关键词
飞行器再入/高焓电弧风洞/电子密度诊断/静电探针/流场数值模拟Key words
flight vehicle reentry/high enthalpy arc-heated wind tunnel/electron density diagnosis/electrostatic probe/flow field numerical simulation分类
航空航天引用本文复制引用
曾徽,闫宪翔,陈智铭,苗文博,周靖云..高焓电弧风洞等离子体参数测量[J].空气动力学学报,2025,43(7):108-117,10.基金项目
国家重点研发计划(2024YFA1612300) （2024YFA1612300）
