[
    {
        "id": "authors:bjkbf-sfz30",
        "collection": "authors",
        "collection_id": "bjkbf-sfz30",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:RASaiaaj02",
        "type": "article",
        "title": "Experiments on Passive Hypervelocity Boundary-Layer Control Using an Ultrasonically Absorptive Surface",
        "author": [
            {
                "family_name": "Rasheed",
                "given_name": "A.",
                "clpid": "Rasheed-A"
            },
            {
                "family_name": "Hornung",
                "given_name": "H. G.",
                "orcid": "0000-0002-4903-8419",
                "clpid": "Hornung-H-G"
            },
            {
                "family_name": "Fedorov",
                "given_name": "A. V.",
                "clpid": "Fedorov-A-V"
            },
            {
                "family_name": "Malmuth",
                "given_name": "N. D.",
                "clpid": "Malmuth-N-D"
            }
        ],
        "abstract": "Recently performed linear stability analyses suggested that transition could be delayed in hypersonic boundary layers by using an ultrasonically absorptive surface to damp the second mode (Mack mode). Boundary-layer transition experiments were performed on a sharp 5.06-deg half-angle round cone at zero angle of attack in the T5 Hypervelocity Shock Tunnel to test this concept. The cone was constructed with a smooth surface around half the cone circumference (to serve as a control) and an acoustically absorptive porous surface on the other half. Test gases investigated included nitrogen and carbon dioxide at M\u221e \u2243 5 with specific reservoir enthalpy ranging from 1.3 to 13.0 MJ/kg and reservoir pressure ranging from 9.0 to 50.0 MPa. Comparisons were performed to ensure that previous results obtained in similar experiments (on a regular smooth surface) were reproduced, and the results were extended to examine the effects of the porous surface. These experiments indicated that the porous surface was highly effective in delaying transition provided that the pore size was significantly smaller than the viscous length scale.",
        "issn": "0001-1452",
        "publisher": "AIAA",
        "publication": "AIAA Journal",
        "publication_date": "2002-03",
        "series_number": "3",
        "volume": "40",
        "issue": "3",
        "pages": "481-489"
    },
    {
        "id": "authors:ar2m5-jx713",
        "collection": "authors",
        "collection_id": "ar2m5-jx713",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:PRApof00",
        "type": "article",
        "title": "The late-time development of the Richtmyer\u2013Meshkov instability",
        "author": [
            {
                "family_name": "Prasad",
                "given_name": "J. K.",
                "clpid": "Prasad-J-K"
            },
            {
                "family_name": "Rasheed",
                "given_name": "A.",
                "clpid": "Rasheed-A"
            },
            {
                "family_name": "Kumar",
                "given_name": "S.",
                "clpid": "Kumar-Sanjay"
            },
            {
                "family_name": "Sturtevant",
                "given_name": "B.",
                "clpid": "Sturtevant-B"
            }
        ],
        "abstract": "Measurements have been made of the growth by the Richtmyer\u2013Meshkov instability of nominally single-scale perturbations on an air/sulfur hexafluoride (SF6) interface in a large shock tube. An approximately sinusoidal shape is given to the interface by a wire mesh which supports a polymeric membrane separating the air from the SF6. A single shock wave incident on the interface induces motion by the baroclinic mechanism of vorticity generation. The visual thickness delta of the interface is measured from schlieren photographs obtained singly in each run and in high-speed motion pictures. Data are presented for delta at times considerably larger than previously reported, and they are tested for self-similarity including independence of initial conditions. Four different initial amplitude/wavelength combinations at one incident shock strength are used to determine the scaling of the data. It is found that the growth rate decreases rapidly with time, ddelta/dt[proportional]t\u2013p (i.e., delta[proportional]t1\u2013p), where 0.67<~p<~0.74 and that a small dependence on the initial wavelength lambda0 persists to large time. The larger value of the power law exponent agrees with the result of the late-time-decay similarity law of Huang and Leonard [Phys. Fluids 6, 3765\u20133775 (1994)]. The influence of the wire mesh and membrane on the mixing process is assessed.",
        "doi": "10.1063/1.870456",
        "issn": "1070-6631",
        "publisher": "Physics of Fluids",
        "publication": "Physics of Fluids",
        "publication_date": "2000-08",
        "series_number": "8",
        "volume": "12",
        "issue": "8",
        "pages": "2108-2115"
    }
]