Journal of the Aerospace Sciences最新文献

{"title":"Experimental Effect of Bluntness and Gas Rarefaction on Drag Coefficients and Stagnation Heat Transfer on Axisymmetric Shapes in Hypersonic Flow","authors":"D. Bloxsom","doi":"10.2514/8.9861","DOIUrl":"https://doi.org/10.2514/8.9861","url":null,"abstract":"X« = mean free path behind sphere shock A = sphere shock standoff distance FQ = drag force m = mass a = acceleration T,nin = minimum activation temperature of paint = 400°K T = wall temperature n = spectral order number, 3, 5, 7 X = wavelength of light in Angstrom units Inverted hemispheres, circular discs (normal to stream), spheres, 26° total angle 0.368 blunt hemisphere cones, 18° totalangle sharp cones, and other axisymmetric shapes were run in a hyper velocity wind tunnel. Hypersonic drag coefficients at zero angle of attack were measured in the air velocity range, 7,00020,500 ft/sec and Knudsen number range, 0.0001-0.34. Drag coefficient is defined as drag for c<t/qA JL. Knudsen number is defined as 1/3 mean free path behind shock/sphere shock detachment distance. In the case of nonsphere shapes, the Knudsen number is denned as the Knudsen number of a sphere with the same base diameter. These drag coefficients cover the range of gasdynamics to free molecule flow and are given in graphical form. The drag coefficients were measured by means of a ballistic balance in millisecond intervals, and referenced to the drag coefficient of a sphere in the gasdynamics region, for a gamma of 1.4, of 0.92. Tunnel stagnation conditions of pressure, temperature, density, and pressure drop with time were measured directly. In the tunnel test section, velocity, q density, total pressure, and static pressure were measured directly. These experimental curves have been found useful in the analysis of complex shapes if the complex shapes can be easily broken down into simple components with small interactions between components. Heat-transfer distributions have also been obtained on these and other complex shapes in the hypervelocity wind tunnel, by means of a special paint which changes through several visible spectral orders within a heat transfer range of X10 for a single application. Heat transfer rates, so obtained, have been performed in the hypersonic gasdynamic and slip flow regions and are presented for spheres. These data, in the vorticity interaction region, agree with the data of Ferri and Zakkay.*","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129138155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Inviscid Flow Field in the Wake of Hypersonic Bodies","authors":"K. Wan","doi":"10.2514/8.9883","DOIUrl":"https://doi.org/10.2514/8.9883","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127271681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comment on Lyapunov and Pitch-Yaw Stability With Rolling","authors":"P. Parks","doi":"10.2514/8.9897","DOIUrl":"https://doi.org/10.2514/8.9897","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127853083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Approximate Determination of Position of the Sonic Line for a Blunt Body in Hypersonic Flow","authors":"M. A. Rahman","doi":"10.2514/8.9880","DOIUrl":"https://doi.org/10.2514/8.9880","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125687609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Propagation of a Nonuniform Magnetohydrodynamic Shock Wave Into a Moving Monatomic Fluid","authors":"R. Gundersen","doi":"10.2514/8.9860","DOIUrl":"https://doi.org/10.2514/8.9860","url":null,"abstract":"Summary An initially uniform magnetohydrodynamic shock wave of arbitrary strength propagates through a channel which consists of two portions of which one has uniform cross-sectional area while the other is of varying cross-sectional area. It is assumed that the flow in the nonuniform section in front of the shock is initially a uniform state and no perturbations (due to the area variations) of this flow reach the shock until the area variation is encountered. When the shock enters the nonuniform section, it is perturbed, the shock strength altered and the subsequent flow is nonisentropic. In addition to the perturbation due to the effect of the area variations on the initially uniform upstream flow, there are two further contributions—viz., a permanent perturbation caused directly b}^ the area changes and a transient disturbance— which propagates with true sonic speed with respect to the flow behind the shock, due to reflections of the permanent perturba­ tion at the shock. Expressions for these various contributions are obtained. The results presented include as special cases propaga­ tion of a nonuniform conventional gas dynamic shock into a moving nonconducting fluid and propagation of a nonuniform hydromagnetic shock wave into a stationary fluid.","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116186759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Similar Solutions in Magnetohydrodynamics","authors":"J. Fillo","doi":"10.2514/8.9874","DOIUrl":"https://doi.org/10.2514/8.9874","url":null,"abstract":"T J ECENTLY, Reeves and Kippenhan found a particular class of •*-V. similar solutions of the two-dimensional equations of motion and energy of an incompressible, viscous fluid. The equations analyzed were not subjected to boundary-layer simplifications. With the steadily increasing interest in magnetohydrodynamics, the question thus arose of the possibility of applying the \"classical\" similarity hypothesis to the Navier-Stokes equations including M H D effects, as well as to the equation governing the magnetic field. This has been done for boundary-layer problems in Refs. 2-7. In this note a class of solutions is found for two dimensional flow, without the boundary-layer assumptions.","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125229808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis and Synthesis of a Particular Class of Satellite Attitude-Control Systems - Part II, Synthesis Results","authors":"C. Leondes","doi":"10.2514/8.9866","DOIUrl":"https://doi.org/10.2514/8.9866","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"123 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123990120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stagnation-Point Heat Transfer in Partially Ionized Air","authors":"R. Różycki","doi":"10.2514/8.9885","DOIUrl":"https://doi.org/10.2514/8.9885","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131947828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Note on a Soap-Film Paradox","authors":"R. A. Gellatly","doi":"10.2514/8.9882","DOIUrl":"https://doi.org/10.2514/8.9882","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"06 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129088006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Slip Flow with Axial Pressure Gradient","authors":"A. Pozzi, P. Renno","doi":"10.2514/8.9833","DOIUrl":"https://doi.org/10.2514/8.9833","url":null,"abstract":"","PeriodicalId":336301,"journal":{"name":"Journal of the Aerospace Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114958815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}