An instrumentation system employing an RPV (remotely piloted vehicle) platform was developed for temporally and statially resolved air pollution measurements, and was used to measure the evolution of gas-phase HCl in exhaust clouds from a solid rocket motor firing and fuel pit burns. A thermistor and a sensitive (ppmv-level), rapid-response (<0.1 sec) infrared absorption sensor for HCl were mounted in a flow channel in the RPV, permitting concentration and temperature mearurements to be made in a cloud on a several-meter scale. The RPV system was flown in a series of field tests at Thiokol Corporation's Elkton, MD division to evaluate the HCl content of the exhaust products of a new Mg-based fuel formulation. Measurements were made in the clouds from Al-based and Mg-based solid fuel pit burns and a Mg-fueled motor firing over periods of several minutes. Elevated temperatures and HCl concentrations were found to be temporally correlated with video images of the particulate cloud. Cl originating from the ammonium perchlorate oxidizer appeared in the exhaust as HCl in each of the tests. Both the Mg-based fuel may provide some reduction in HCl concentration compared to the standard Al-based fuel.


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    Title :

    In situ measurement of hydrochloric acid in rocket exhaust clouds using a remotely piloted aircraft


    Additional title:

    In situ-Messung von Chlorwasserstoff in Raketenabgaswolken unter Verwendung eines ferngesteuerten Flugzeuges


    Contributors:
    Richtsmeier, S.C. (author) / Goldstein, N. (author) / Bien, F. (author) / Schuch, C. (author) / Buckley, J. (author) / Bennett, R.R. (author) / Wallace, I.A. (author)


    Publication date :

    1995


    Size :

    8 Seiten, 8 Bilder, 6 Tabellen, 8 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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