Experimental Measurements and Computations for Clarifying Nearly Complete Air-Insulation Obtained by the Concept of Colliding Pulsed Supermulti-Jets

Remi Konagaya, Susumu Oyanagi, Takuto Kanase, Jumpei Tsuchiya, Ken Ayukawa, Kodai Kinoshita, Junya Mikoda, Hirotaka Fujita, Ken Naitoh

    Research output: Contribution to journalArticle

    Abstract

    In our previous papers, a new concept of a compressive combustion engine (Fugine) was proposed based on the collision of pulsed supermulti-jets, which can enclose the burned gas around the chamber center leading to an air-insulation effect and also a lower exhaust gas temperature due to high single-point compression. In order to examine the compression level and air-insulation effect as basic data for application to automobiles, aircraft, and rockets, a prototype engine based on the concept, i.e., a piston-less prototype engine with collision of bi-octagonal pulsed multi-jets from fourteen nozzles, was developed. Some combustion results [Naitoh et al. SAE paper, 2016] were recently reported. However, there was only one measurement of wall temperature and pressure in the previous report. Thus, in this paper, more experimental data for pressures and temperatures on chamber walls and exhaust temperatures, are presented for the prototype engine. First, pressure over 0.6MPa was measured on the chamber wall. A nearly complete air insulation effect was presumably obtained based on the experimental data for temperature measured on the chamber wall. The measured exhaust temperature was at an intermediate level around 700K. Experimental data are also presented for the air-insulation effect on a small solid wall located downstream from the collision point of the supermulti-jets. Unsteady three-dimensional computations of compressible flow also indicate that the experimental result of 0.6 MPa at the cylinder wall implies pressure of about 5 MPa at the collision point of the jets. The potential for high thermal efficiency is evaluated on the basis of the data.

    Original languageEnglish
    JournalSAE Technical Papers
    Volume2017-March
    Issue numberMarch
    DOIs
    Publication statusPublished - 2017 Mar 28

    Fingerprint

    Insulation
    Air
    Engines
    Temperature
    Compressible flow
    Engine cylinders
    Rockets
    Exhaust gases
    Pistons
    Automobiles
    Nozzles
    Compaction
    Aircraft
    Gases

    ASJC Scopus subject areas

    • Automotive Engineering
    • Safety, Risk, Reliability and Quality
    • Pollution
    • Industrial and Manufacturing Engineering

    Cite this

    Experimental Measurements and Computations for Clarifying Nearly Complete Air-Insulation Obtained by the Concept of Colliding Pulsed Supermulti-Jets. / Konagaya, Remi; Oyanagi, Susumu; Kanase, Takuto; Tsuchiya, Jumpei; Ayukawa, Ken; Kinoshita, Kodai; Mikoda, Junya; Fujita, Hirotaka; Naitoh, Ken.

    In: SAE Technical Papers, Vol. 2017-March, No. March, 28.03.2017.

    Research output: Contribution to journalArticle

    Konagaya, Remi ; Oyanagi, Susumu ; Kanase, Takuto ; Tsuchiya, Jumpei ; Ayukawa, Ken ; Kinoshita, Kodai ; Mikoda, Junya ; Fujita, Hirotaka ; Naitoh, Ken. / Experimental Measurements and Computations for Clarifying Nearly Complete Air-Insulation Obtained by the Concept of Colliding Pulsed Supermulti-Jets. In: SAE Technical Papers. 2017 ; Vol. 2017-March, No. March.
    @article{89bc83354cd942d0a565e2f9d9dc547a,
    title = "Experimental Measurements and Computations for Clarifying Nearly Complete Air-Insulation Obtained by the Concept of Colliding Pulsed Supermulti-Jets",
    abstract = "In our previous papers, a new concept of a compressive combustion engine (Fugine) was proposed based on the collision of pulsed supermulti-jets, which can enclose the burned gas around the chamber center leading to an air-insulation effect and also a lower exhaust gas temperature due to high single-point compression. In order to examine the compression level and air-insulation effect as basic data for application to automobiles, aircraft, and rockets, a prototype engine based on the concept, i.e., a piston-less prototype engine with collision of bi-octagonal pulsed multi-jets from fourteen nozzles, was developed. Some combustion results [Naitoh et al. SAE paper, 2016] were recently reported. However, there was only one measurement of wall temperature and pressure in the previous report. Thus, in this paper, more experimental data for pressures and temperatures on chamber walls and exhaust temperatures, are presented for the prototype engine. First, pressure over 0.6MPa was measured on the chamber wall. A nearly complete air insulation effect was presumably obtained based on the experimental data for temperature measured on the chamber wall. The measured exhaust temperature was at an intermediate level around 700K. Experimental data are also presented for the air-insulation effect on a small solid wall located downstream from the collision point of the supermulti-jets. Unsteady three-dimensional computations of compressible flow also indicate that the experimental result of 0.6 MPa at the cylinder wall implies pressure of about 5 MPa at the collision point of the jets. The potential for high thermal efficiency is evaluated on the basis of the data.",
    author = "Remi Konagaya and Susumu Oyanagi and Takuto Kanase and Jumpei Tsuchiya and Ken Ayukawa and Kodai Kinoshita and Junya Mikoda and Hirotaka Fujita and Ken Naitoh",
    year = "2017",
    month = "3",
    day = "28",
    doi = "10.4271/2017-01-1030",
    language = "English",
    volume = "2017-March",
    journal = "SAE Technical Papers",
    issn = "0148-7191",
    publisher = "SAE International",
    number = "March",

    }

    TY - JOUR

    T1 - Experimental Measurements and Computations for Clarifying Nearly Complete Air-Insulation Obtained by the Concept of Colliding Pulsed Supermulti-Jets

    AU - Konagaya, Remi

    AU - Oyanagi, Susumu

    AU - Kanase, Takuto

    AU - Tsuchiya, Jumpei

    AU - Ayukawa, Ken

    AU - Kinoshita, Kodai

    AU - Mikoda, Junya

    AU - Fujita, Hirotaka

    AU - Naitoh, Ken

    PY - 2017/3/28

    Y1 - 2017/3/28

    N2 - In our previous papers, a new concept of a compressive combustion engine (Fugine) was proposed based on the collision of pulsed supermulti-jets, which can enclose the burned gas around the chamber center leading to an air-insulation effect and also a lower exhaust gas temperature due to high single-point compression. In order to examine the compression level and air-insulation effect as basic data for application to automobiles, aircraft, and rockets, a prototype engine based on the concept, i.e., a piston-less prototype engine with collision of bi-octagonal pulsed multi-jets from fourteen nozzles, was developed. Some combustion results [Naitoh et al. SAE paper, 2016] were recently reported. However, there was only one measurement of wall temperature and pressure in the previous report. Thus, in this paper, more experimental data for pressures and temperatures on chamber walls and exhaust temperatures, are presented for the prototype engine. First, pressure over 0.6MPa was measured on the chamber wall. A nearly complete air insulation effect was presumably obtained based on the experimental data for temperature measured on the chamber wall. The measured exhaust temperature was at an intermediate level around 700K. Experimental data are also presented for the air-insulation effect on a small solid wall located downstream from the collision point of the supermulti-jets. Unsteady three-dimensional computations of compressible flow also indicate that the experimental result of 0.6 MPa at the cylinder wall implies pressure of about 5 MPa at the collision point of the jets. The potential for high thermal efficiency is evaluated on the basis of the data.

    AB - In our previous papers, a new concept of a compressive combustion engine (Fugine) was proposed based on the collision of pulsed supermulti-jets, which can enclose the burned gas around the chamber center leading to an air-insulation effect and also a lower exhaust gas temperature due to high single-point compression. In order to examine the compression level and air-insulation effect as basic data for application to automobiles, aircraft, and rockets, a prototype engine based on the concept, i.e., a piston-less prototype engine with collision of bi-octagonal pulsed multi-jets from fourteen nozzles, was developed. Some combustion results [Naitoh et al. SAE paper, 2016] were recently reported. However, there was only one measurement of wall temperature and pressure in the previous report. Thus, in this paper, more experimental data for pressures and temperatures on chamber walls and exhaust temperatures, are presented for the prototype engine. First, pressure over 0.6MPa was measured on the chamber wall. A nearly complete air insulation effect was presumably obtained based on the experimental data for temperature measured on the chamber wall. The measured exhaust temperature was at an intermediate level around 700K. Experimental data are also presented for the air-insulation effect on a small solid wall located downstream from the collision point of the supermulti-jets. Unsteady three-dimensional computations of compressible flow also indicate that the experimental result of 0.6 MPa at the cylinder wall implies pressure of about 5 MPa at the collision point of the jets. The potential for high thermal efficiency is evaluated on the basis of the data.

    UR - http://www.scopus.com/inward/record.url?scp=85018398405&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85018398405&partnerID=8YFLogxK

    U2 - 10.4271/2017-01-1030

    DO - 10.4271/2017-01-1030

    M3 - Article

    VL - 2017-March

    JO - SAE Technical Papers

    JF - SAE Technical Papers

    SN - 0148-7191

    IS - March

    ER -